VOLUME NR 4
INORGANIC CHEMISTRY
UDK 547.548.737
1Y. E. Nazarov, 1Kh. Kh. Turaev, 2J. M. Ashurov, 2A. G. Eshimbetov, 3A. T. Djalilov
SYNTHESIS AND STUDY OF THE BIS-(QUOLIN-8-OLATO)DINITRATO-DI-AQUA-NICKEL(II) COMPLEX
1Termiz State University, Barkamol Avlod street, Termiz, Uzbekistan, 2 Institute of Bioorganic Chemistry named after O.S. Sodikov AS RUz, Tashkent, Uzbekistan, 3Tashkent Scientific Research Institute of Chemical Technology AS RUz, Tashkent, Uzbekistan.
Abstract. Background. There are known metal complexes that exhibit antimicrobial, fungicidal, herbicidal, and biostimulating properties that are relevant for modern agriculture. Work is underway to synthesize new drugs based on 8-hydroxyquinoline.
Purpose: obtaining metal complexes containing 8-hydroxyquinoline, determining its structure, identifying its herbicidal, fungicidal and plant growth stimulating effects.
Methodology. X-ray crystallography at room temperature (Xcalibur R OxfordDiffraction diffractometer).
Originality. The crystal structure and molecular characteristics of the new mixed-ligand complex have been revealed.
Findings. The [Ni2(8-HQ)2(NO3)2(H2O)2] complex was synthesized in the presence of Ni2+ ions, the 8-HQ ligand, and nitric acid, and the structure of its single crystals was studied.
Key words: 8-hydroxyquinoline (8-HQ), nitric acid, crystal structure, H-bond
Highlights:
- complex compound [Ni2(8-HQ)2(NO3)2(H2O)2];
- synthesized in the presence of Ni(II), ligand 8-HQ, HNO3 and H2O
References
1. Prachayasittikul V. et al. 8-Hydroxyquinolines: a review of their metal chelating properties and medicinal applications //Drug design, development and therapy. – 2013. – P. 1157-1178.
2. Vickers N. J. Animal communication: when i’m calling you, will you answer too? //Current biology. – 2017. – Т. 27. – No. 14. – P. R713-R715.
3. A. Sh. Khamrayev, B. A. Hasanov, J. A. Azimov, L. S. Kuchkarova, Z. I. Izzatullayev, E. Sh. Sherna Zarov, A. Jabbarov, I. I. Abdullayev, "Basics of Biodegradation" Textbook-T.<<Science and Technology>> nash., 2013.320 p.
4. S. Srisung, T. Suksrichavalit, S. Prachayasittikul, S. Ruchirawat, V. Prachayasittikul, Antimicrobial activity of 8-hydoxyquinoline and transition metalcomplexes // Int.J. Pharmacol. 9(2). -2013. –P.170 -175
5. Xu H. et al. 8-Hydroxyquinoline: A privileged structure with a broad-ranging pharmacological potential //MedChemComm. – 2015. – Т. 6. – No 1. – P. 61-74.
6. Qin Q. P. et al. Studies on antitumor mechanism of two planar platinum (II) complexes with 8-hydroxyquinoline: synthesis, characterization, cytotoxicity, cell cycle and apoptosis //European journal of medicinal chemistry. – 2015. – Т. 92. – P. 302-313.
7. Li H. et al. In situ route to novel fluorescent mesoporous silica nanoparticles with 8-hydroxyquinolinate zinc complexes and their biomedical applications //Microporous and Mesoporous Materials. – 2012. – Т. 151. – P. 293-302.
8. Nazarov Yu.E., Turaev X.X., Kasimov, Sh.A., Jalilov A.T. Synthesis and study of 5-bromo 5, 7-dibromo 8-hydroxyquinoline // Universum: chemistry and biology. – 2022. – No. 7-1 (97). – pp. 64-67.
9. Xcalibur. Oxford Difraction Ltd. CrysAlisPro. Version.1.171.33.44, 2009.
10. G. M. Sheldrick, “SHELXS-97 and SHELXL-97, Program for Crystal Structure Solution and Refinement,” University of Gottingen, Gottingen, 1997.
11. C.F. Macrae, I.J. Bruno, J.A. Chisholm, P.R. Edington, P. McCabe, E. Pidcock, L. Rodriguez-Monge, R. Taylor, J. van de Streek, P.A. Wood, Mercury programme// J Appl Crystallogr. -2008. -41.-466-470.
12. Turner M. J., McKinnon J. J., Wolff S. K., Grimwood D. J., Spackman P. R., Jayatilaka D. &Spackman M. A. (2017). CrystalExplorer17.5. University of Western Australia. http://hirshfeldsurface.net.
To cite this article: Y. E. Nazarov, Kh. Kh. Turaev, J. M. Ashurov, A. G. Eshimbetov, A. T. Djalilov. Synthesis and study of the bis-(quolin-8-olato)dinitrato-di-aqua-nickel(II) complex // Uzbek chemical journal. -2023. – Nr4. - Pp.3-9.
Received: 25.09.2023; Accepted: 13.10.2023; Published: 20.10.2023
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UDK 546.05
A. A. Rasulov, A. G. Eshimbetov, J. M. Ashurov, B. T. Ibragimov
SYNTHESIS AND ANALYSIS OF A COMPLEX COMPOUND BASED ON CO(II) IONS AND NORFLOXACIN
Institute of Bioorganic Chemistry named after O.S. Sodikov AS RUz, 100125, Tashkent, Uzbekistan
Abstract. Background. The creation of safe and highly effective drugs in pharmacology is relevant. These include the bactericidal norfloxacin, from the group of fluoroquinolones. It is used for infections of the prostate, digestive and urinary systems. Work is underway to synthesize new compounds based on it.
Purpose: synthesis of a new biologically active compound - a metal complex with norfloxacin, determination of its structure.
Methodology. The method of X-ray crystallography (Xcalibur R Oxford Diffraction diffractometer) at room temperature and IR spectroscopy (IRTracer-100 from Shimadzu, Japan) were used.
Originality. The crystal structure and molecular characteristics of a new mixed-ligand complex were obtained for the first time.
Findings. A new mixed-ligand complex [Co(HL)2(H2O)2](CH3COO)Cl(H2O)2 was obtained, and its molecular characteristics and crystal structure were determined by X-ray crystallography.
Key words: norfloxacin, cobalt (II) chloride, acetic acid, distilled water.
Highlights:
- a new compound was synthesized - a metal complex with norfloxacin;
- a new mixed-ligand complex [Co(HL)2(H2O)2](CH3COO)Cl(H2O)2.
References
1. Appelbaum, P. C., & Hunter, P. A. (2000). The fluoroquinolone antibacterials: past, present and future perspectives // International Journal of Antimicrobial Agents. -16(1). –Р.5–15. doi:10.1016/s0924-8579(00)00192-8
2. Reidy J.J., Hobden J.A., Hill J.M., Forman K., O’Callaghan R.J. The efficacy of topical ciprofloxacin and norfloxacin in the treatment of experimental Pseudomonas keratitis // Cornea. –1991. –V.10. –P.25-28.
3. Martins, D. A., Gouvea, L. R., (2016). Norfloxacin and N-Donor Mixed-Ligand Copper (II) Complexes: Synthesis, Albumin Interaction, and Anti-Trypanosoma cruzi Activity. //Bioinorganic Chemistry and Applications. -2016. –Р.1–11. doi: 10.1155/2016/5027404
4. Katsarou M.E., Efthimiadou E.K., Psomas G., Karaliota A., Vourloumis D. Novel Copper (II) Complex of N-Propyl-norfloxacin and 1,10-Phenanthroline with Enhanced Antileukemic and DNA Nuclease Activities // J. Med. Chem.–2008. –V.51. –P. 470-478.
5. Fang, T., Li, X., Wang, C. et al. The action of norfloxacin complexes on Tetrahymena investigated by microcalorimetry // J Therm Anal Calorim 109. –Р.433–439. -2012. https://doi.org/10.1007/s10973-011-1674-7
6. Drevensek P., Kosmrlj J., Giester G., Skauge T., Sletten E., Sepcic K., Turel I. X-Ray crystallo-graphic, NMR and antimicrobial activity studies of magnesium complexes of fluoroquinolones–racemic ofloxacin and its S-form, levofloxacin // J. Inorg. Biochem. –2006. –V.100. –P. 1755-1763.
7. Neese F. WIREs Comput Mol Sci. – 2022. – Т. 12. – No. 5. – P. 1606.
8. S.I. Tirkasheva, O.E. Ziyadullaev. A. G. Eshimbetov, B. T. Ibragimov and J. M. Ashurov "Synthesis, crystal structure, Hirshfeld surface analysis and DFT study of the 1,100-(buta-1,3-diyne-1,4-diyl)bis(cyclohexan-1-ol)" Acta Cryst. (2023). E79 https://doi.org/10.1107/S2056989023004772
9. Xcalibur. Oxford Difraction Ltd. CrysAlisPro. Version.1.171.33.44, 2009.
10. G. M. Sheldrick, “SHELXS-97 and SHELXL-97, Program for Crystal Structure Solution and Refinement. -” University of Gottingen, Gottingen, 1997.
11. C.F. Macrae, I.J. Bruno, J.A. Chisholm, P.R. Edington, P. McCabe, E. Pidcock, L. Rodriguez-Monge, R. Taylor, J. van de Streek, P.A. Wood, Mercury programme// J Appl Crystallogr.-2008. -41.-466-470.
12. Turner, M. J., McKinnon, J. J., Wolff, S. K., Grimwood, D. J., Spackman, P. R., Jayatilaka, D. & Spackman, M. A. 2017, Turner CrystalExplorer17. University of Western Australia. http://Hirshfeldsurface.net.
13. Golovnev N. N. et al. Crystal structure of norfloxacinium and 2, 2′-bipyridyl-1′-ium 2-thiobarbiturates //Journal of Structural Chemistry. – 2020. – Т. 61. – С. 1639-1647. doi: 10.1134/s0022476620100170
14. Prech E. et al., Determination of the structure of organic compounds (spectral data table) 2006. 441 p.
To cite this article: A. A. Rasulov, A. G. Eshimbetov, J. M. Ashurov, B. T. Ibragimov. Synthesis and analysis of a complex compound based on Co(II) ions and norfloxacin // Uzbek chemical journal. -2023. – Nr4. - Pp.10-17.
Received: 22.09.2023; Accepted: 17.10.2023; Published: 20.10.2023
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UDK 547.538.581.241.661.744.14
A.B. Parmanov, S. E. Nurmanov
REACTION OF AROMATIC CARBOXYLIC ACIDS WITH PHENYLACETYLENE IN THE PRESENCE OF A CATALYST
National University of Uzbekistan, E-mail: asqar.parmanov@mail.ru
Abstract. Background. Vinyl esters of carboxylic acids are widely used in organic synthesis, in particular in acylation reactions, substrates in asymmetric hydrogenation, cycloaddition, aldol and Mannich reactions, and the synthesis of vinylarenes based on decarboxylation. Vinyl ethers are also used as monomers in polymerization reactions. Their preparation by the action of alkynes on carboxylic acids in the presence of 3d-metal catalysts is promising and requires additional study.
Purpose. Synthesis of vinyl esters by the reaction of benzoic, 4-methylbenzoic, 4-bromobenzoic and 2-bromobenzoic acids with phenylacetylene under homogeneous conditions, in the presence of catalytic systems, studying the properties of the synthesis products, carrying out quantum chemical calculations of the process.
Methodology. The interaction of substituted benzoic acids, in particular, 4-methylbenzoic acid, 4-bromobenzoic acid and 2-bromobenzoic acid with phenylacetylene, in the presence of catalysts, was used. The methods used were IR, 1H, 13C NMR and mass spectral analysis.
Originality. The synthesis of vinyl esters of benzoic, 4-methylbenzoic, 4-bromobenzoic and 2-bromobenzoic acids with tetrakis-(2-amino-5-ethylthio-1,3,4-thiadiazole) zinc(II) dinitrate ([Zn(C4H7S2)4](NO3)2) including phenylacetylene with the participation of a complex catalytic system.
Findings. In the reaction of carboxylic acids with phenylacetylene, a mixture of combination products is formed according to the Markovnikov and Anti-Markovnikov rules. It has been established that the yield of vinyl esters increases in the series 4-CH3-С6Н4СООН< С6Н5СООН< 4-Br-С6Н4СООН< 2-Br-С6Н4СООН. The yield of the reaction products of phenylacetylene with carboxylic acids is: 44% (65/35) for 4-methylbenzoic acid, 67% (80/20) for benzoic acid, 78% (82/18) for 4-bromobenzoic acid, 82% (85 /15) for 2-bromobenzoic acid.
Key words: benzoic acid, phenylacetylene, styryl benzoate, Markovnikov combination, tetrakis-(2-amino-5-ethylthio-1,3,4-thiadiazole)-zinc(II) dinitrate.
Highlights:
- reaction of carboxylic acids with phenylacetylene in the presence of catalysts;
- structure of carboxylic acid molecules, nature of radicals and product yield;
- influence of the nature of the catalyst and solvent on the yield of vinyl esters;
- methods of IR, 1H, 13C spectroscopy, gas chromatography-mass spectrometry.
References
1. Parmanov A.B., Nurmonov S.Э., Tursunov Sh., Erkhanova Y. Facile synthesis of vinyl esters of aromatic carboxylic acids with the participation of 2-chloro-4,6-dimethoxy-1,3,5-triazine. // E3S Web of Conferences 401, 04055 (2023).
2. A.B.Parmanov, S.E.Nurmanov, Sh.Sh.Tursunov, N.U.Bekboeva. Synthesis of vinyl compounds based on phenylacetylene // X International Scientific Conference “Actual problems of solid state physics” (APSSP-2023). -May 22-26, 2023.-Minsk (Belarus). -P. 302.
3. Jeschke, J.; Gabler, C.; Lang, H. Regioselective Formation of Enol Esters from the Ruthenium Catalyzed Markovnikov Addition of Carboxylic Acids to Alkynes // J. Org. Chem. -2016.-81.-476−484.
4. Yu S.; Wu C.; Ge S. Cobalt-Catalyzed Asymmetric Hydroboration /Cyclization of 1,6-Enynes with Pinacolborane // J. Am. Chem. Soc. -2017.-139.-6526−6529.
5. S.I.Tirkasheva, O.E.Ziyadullaev, V.M.Muzalevskiy, A.B.Parmanov. 8,13-Dimethylicosa-9,11-diyne-8,13-diol // Molbank 2022.-2022.-M1484. https://doi.org/10.3390/M1484 .
6. Teo W. J.; Wang C.; Tan Y. W.; Ge S. Cobalt-Catalyzed Z-Selective Hydrosilylation of Terminal Alkynes //Angew. Chem. -Int. Ed. -2017.-56.- 4328−4332.
7. Guo J.; Cheng B.; Shen X.; Lu Z. Cobalt-Catalyzed Asymmetric Sequential Hydrobora-tion/Hydrogenation of Internal Alkynes // J. Am. Chem. Soc. -2017.-139, 15316−15319.
8. WangY.; Wang Z.; Li Y.; Wu G.; Cao Z.; Zhang L. A General Ligand Design for Gold Catalysis Allowing Ligand-Directed AntiNucleophilic Attack of Alkynes // Nat. Commun. -2014.-5, 3470.
9. Pham M. V.; Cramer N. Rhodium (III)/Copper (II)-Promoted trans-Selective Heteroaryl Acyloxylation of Alkynes: Stereodefined Access to trans-Enol Esters. Angew // Chem. Int. Ed. -2014.-53, 14575–14579.
10. Dixneuf P. H. Catal. Lett. Early Steps of Homogeneous Catalysis in Rennes: Carbon Dioxide Incorporation, Alkyne Activation and Ruthenium Catalysis. -2015.-145, 360–372.
11. Parmanov A.B., Nurmanov S.E., Torambetov B.S., Bekboeva N.U., Kholmukhammedov N.D. Synthesis of vinyl compounds based on phenylacetylene // Current trends in the development of chemistry and chemical technology in the Aral region // KorDU. Res. conf. March 13.-Nukus. - 2023 -B. 169-170.
12. Alegre S.; Alberico E.; Pàmies O.; Diéguez M. Tetrahedron Asymmetry Rhodium Furanoside Monophosphite Catalyzed Asymmetric Hydrogenation.–2014.-25.-p. 258–262.
13. Chen F.; Kreyenschulte C.; Radnik J.; Lund H.; Surkus A.E.; Junge K.; Beller M. Selective Semihydrogenation of Alkynes with N-GraphiticModified Cobalt Nanoparticles Supported on Silica // ACS Catal. -2017.-7, 1526−1532.
14. Tokmic K.; Fout A. R. Alkyne Semihydrogenation with a Well-Defined Nonclassical Co−H2 Catalyst: A H2 Spin on Isomerization and ESelectivity // J. Am. Chem. Soc. -2016.-138, 13700−13705.
15. Moselage, M.; Li, J.; Ackermann, L. Cobalt Catalyzed C−H Activation. // ACS Catal. -2016.-6, 498−525.
16. Zhang X.; Zhang W.Z.; Ren X.; Zhang L.L.; Lu X.B. Org. Lett. Ligand-Free Ag(I)-Catalyzed Carboxylation of Terminal Alkynes with CO2 2011, 13, 2402–2405.
17. J. González, J. Francos, S. E. García-Garrido, V. Cadierno Menéndez. The intermolecular hydro-oxycarbonylation of internal alkynes: Current state of the art.Arkivoc, 2 (2018) 17-39.
18. Jeschke J.; Gäbler C.; Korb M.; Rüffer T.; Lang H. Eur. //J. Inorg. Chem. Chemical vapor deposition of ruthenium-based layers by a single-source approach. -2015.-2939–2947.
To cite this article: A.B. Parmanov, S. E. Nurmanov. Reaction of aromatic carboxylic acids with phenylacetylene in the presence of a catalyst // Uzbek chemical journal. -2023. – Nr4. - Pp.17-24.
Received: 05.08.2023; Accepted: 10.10.2023; Published: 20.10.2023
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UDK 547.992.2
1B. M. Smailov, 2B. S. Zakirov, 1O. K. Beisenbayev
THERMODYNAMIC REGULARITIES OF THE PROCESS OF FORMATION OF BOILER DUST
1South Kazakhstan University named after M. Auezov, 2Institute of General and Inorganic Chemistry AS RUz
Abstract. Background. Accumulated industrial waste, including from phosphorus production in Kazakhstan, in the form of slag, ferro-phosphorus, phosphorus sludge and cottrel dust, creates serious environmental problems in the regions. Their recycling is important.
Purpose. Study of the thermodynamic laws of the process of formation of kottrel dust.
Methodology. Thermodynamic calculations of the reactions of kottrel dust formation were studied using the Chemistry HSC-6 programs.
Originality. The thermodynamic regularities of the processes of formation of kotrel dust from the electric smelting of phosphorite raw materials have been studied.
Findings. The chemical reactions responsible for the formation of kottrel dust, the values of their entropy, enthalpy and Gibbs energy are determined.
Key words: cottrel dust, phosphorus, industrial waste, entropy, enthalpy, Gibbs energy.
Highlights:
- thermodynamic laws, reaction mechanism;
- formation of kotrel dust during electric smelting of phosphate rock;
- methods of elemental analysis, electron microscopy.
References
1. M. Baygarin. There is no waste - there is unfinished production: stop the accumulation of industrial waste in Kazakhstan.
2. V.A. Ershov., S.D. Pimenov. Electrothermy of phosphorus. – St. Petersburg: Publishing house. “Chemistry”, 1996. – pp. 190-194.
3. Roine A. Outokumpu HSC Chemistry for Windows. Chemical Reaction and Eguilibrium loftware with Extensive Thermochemical Datebase. Pori: Outokumpu Resaerch OY, 2002.
4. Smailov B.M. Development of technology for producing chelate polymer-containing fertilizers based on coal dust and coal waste: dis... doc. Philosopher PhD: 6D072000/ SKU im. M. Auezova. – Shymkent, 2021. – P.33-41.
5. B.M. Smailov, O.K. Beisenbayev, A.S.Tleuov, A.A Kadirbaeva, B.S. Zakirov and B. Mirzoyev // Rasayan J. Chem. -Vol. 13. -No.3. -2020. -Рp.1372-1378. http://dx.doi.org/10.31788 /RJC.2020.1335726
6. B.M. Smailov, M. A. Zharkinbekov, K. T. Tuleshova, N.N. Issabayev, A.S. Tleuov, O.K. Beisenbayev, M.M. Esirkepova and А.M. Azimov // Russian J. Chem. -Vol. 14. -No.3. -2021. -Рp. 1899-1905. http://doi.org/10.31788/RJC.2021.1436391
7. B.M. Smailov, B.S. Zakirov, O.K. Beisenbayev, A.S. Tleuov, A.B. Issa, А.M. Azimov, N.N. Issabayev, G.S. Bolyssova and A.A.Toktabek. Thermodynamic-kinetic research and mathematical planning on the obtaining of phosphorus-containing components based on cottrel dust from phosphorus production waste // Russian J. Chem. -Vol. 15.-No.4. -2022. -Jaipur, India. http://doi.org/10.31788/RJC.2022.1547022
8. Smailov, B.M., Aravind, Usha K, Zakirov, B.S., Azimov, А.M, Tleuov, A.S., Beisenbayev, O.K., Aimenov Zh.T. and Issabayev, N.N. Technology for obtaining chelated organomineral micro-fertilizers based on humate-containing components // Russian J. Chem. -2023. -16(1). Рp. 428-433. http://doi.org/10.31788/RJC.2023.1618007
9. Beysenbayev О. К., Tleuov A. S., Smailov В.М., Zakirov В.S. Obtaining and research of physical and chemical properties of chelated polymer-containing microfertilizers on the basis of technogenic waste for rice seed biofortification» // News Natl. Acad. Sci. -Repub. Kazakhstan. -2019. -438. Рp.80-89. https://doi.org/10.32014/2019.2518-170X.10
10. Beysenbayev О.К., Ahmedov U.K., Issa A.B., Smailov В.М., Esirkepova M.M., Artykova Zh.K. Receiving and research of the mechanism of capsulation of superphosphate and double superphosphate for giving of strength properties // News of the National academy of sciences of the Republic of Kazakhstan. -2019. -6(438). -Рp.36-45. https://doi.org/10.32014/2019.2518-170X.153
11. Ismailov, B., Zakirov, B., Kadirbayeva, A., Koshkarbayeva, Sh., Smailov, B., Azimov, A., Issabayev, N. Methods for Obtaining Phosphorus-Containing Fertilizers Based on Industrial Waste // Inorganics. - 2023. -11. -224. https://doi.org/10.3390/inorganics11060224
12. Smailov B.M., Zakirov B.S., Koshkarbayeva Sh.Т., Kadirbayeva A.А., Aravind Usha K., Issabayev N.N. Physico-chemical studies of raw materials for obtaining phosphorus-containing fertilizers // Chem. J. Kaz. -2023. -2(82). -Рр.130-140. https://doi.org/10.51580/2023-2.2710-1185.20
To cite this article: B. M. Smailov, B. S. Zakirov, O. K. Beisenbayev. Thermodynamic regularities of the process of formation of boiler dust // Uzbek chemical journal. -2023. – Nr4. - Pp.24-29.
Received: 15.08.2023; Accepted: 10.10.2023; Published: 20.10.2023
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UDC 666.972.16
1H. H. Turaev, 1A. S. Mukimov, 1P. J. Tozhiev, 2M. U. Karimov
PHYSICO-CHEMICAL PROPERTIES OF MICRO SILICA CEMENT COMPOSITE
1Termez State University, 2Tashkent Scientific Research Institute of Chemical Technology
Abstract. Background. It is known that the production of cement is energy and material-consuming, and with these features, the actual problem of the construction industry is to increase its strength.
Purpose. Increasing the strength of cement while reducing the consumption of clinker for cement production.
Methodology. Determination of cement strength was carried out according to GOST 197-(1, 2, 3)-2020, compression test - on the press "ATOM TEKNIK 20 t", elemental, IR spectroscopic, thermogravimetric control of its samples was performed.
Originality. It is shown that the introduction of microsilica and polycarboxylate plasticizer into the composition of cement contributes to an increase in the strength of cement up to 21%. The mode of activation of microsilica in triethanolamine at a temperature of 60°C was chosen.
Findings. Activated silica fume accelerates the secondary hydration of Ca(OH)2, the plasticizer improves the dispersion of cement particles, the compressive strength of the product during its hardening is determined, IR spectra, SEM, RXD, TGA samples are presented.
Key words: activated microsilica, pozzolanic activity, hydration, polycarboxylate.
Highlights:
- microsilica is activated in a 5% solution of triethanolamine;
- polycarboxylate superplasticizer as part of the mixture;
- increase in the strength of the modified cement by 20%.
References
1. Muqimov A.S., Turayev Kh.Kh., Karimov M.U., Tojiyev P.J. Study of the mechanical properties of cement with microsilica and zeolite mineral additives // Composite materials: Scientific-technical and practical magazine N4/2022 (In Uzbek) p.56.
2. J.Yajun, & JH Cahyadi. Simulation of silica fume blended cement hydration // Materials and Structures volume 37, p. 397–404 (2004). https://doi.org/10.1007/BF02479636
3. Ahmed, T.I. Influence of Silica Fume and Fly Ash on Settlement Cracking Intensity of Plastic Concrete // Iran J Sci Technol Trans Civ. Eng 45, p. 1633–1643 (2021). https://doi.org/10.1007 /s40996-020-00556-w
4. Byung-WanJoa, Chang-HyunKima, Ghi-hoTaeb, Jong-BinParka Characteristics of cement mortar with nano-SiO2 particles // Construction and Building Materials. Volume 21, Issue 6, June 2007, p. 1351-1355 https://doi.org/10.1016/j.conbuildmat.2005.12.020
5. V.Saraswathy, S. Muralidharan, K. Thangavel, S. Srinivasan. Influence of activated fly ash on corrosion-resistance and strength of concrete // Cement and Concrete Composites. Volume 25, Issue 7,October 2003, p. 673-680 https://doi.org/10.1016/S0958-9465(02)00068-9
6. B.Sameta T.Mnifb M.Chaabounia Use of a kaolinitic clay as a pozzolanic material for cements: Formulation of blended cement // Cement and Concrete Composites. Volume 29, Issue 10, November 2007, p. 741-749 https://doi.org/10.1016/j.cemconcomp.2007.04.012
7. M.Heikala, M.S. Morsyb, I. Aiadc. Effect of treatment temperature on the early hydration characteristics of superplasticized silica fume blended cement pastes // Cement and Concrete Research. Volume 35, Issue 4, April 2005, p. 680-687 https://doi.org/10.1016/j.cemconres.2004.06.012
8. J.M. Gaoa, C.X. Qiana, B. Wanga, K. Morinob. Experimental study on properties of polymer-modified cement mortars with silica fume // Cement and Concrete Research. Volume 32, Issue 1, January 2002, p. 41-45 https://doi.org/10.1016/S0008-8846(01)00626-3
9. Ali Sadrmomtazia, Behzad Tahmouresia, Ashkan Saradarb. Effects of silica fume on mechanical strength and microstructure of basalt fiber reinforced cementitious composites (BFRCC) // Construction and Building Materials Volume 162, 20 February 2018, p. 321-333 https://doi.org/10.1016/j.conbuildmat.2017.11.159
10. Dale P., Bentz Paul, E. Stutzman. Evolution of porosity and calcium hydroxide in laboratory concretes containing silica fume // Cement and Concrete Research Volume. 24, Issue 6, 1994, p. 1044-1050 https://doi.org/10.1016/0008-8846(94)90027-2
To cite this article: H. H. Turaev, A. S. Mukimov, P. J. Tozhiev, M. U. Karimov. Physico-chemical properties of micro silica cement composite // Uzbek chemical journal. -2023. – Nr4. - Pp.29-35.
Received: 11.07.2023; Accepted: 08.09.2023; Published: 20.10.2023
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UDK 628. 349 . 094 . 3
1G. H. Kurbanov, 2V. P. Guro, 1O. K. Raxmonov, 2M. A. Ibragimova, 2Z. A. Nabieva,
ELECTROCHEMICAL PURIFICATION OF OIL AND GAS ENTERPRISE WASTEWATER FROM ORGANIC COMPOUNDS
1Fergana Polytechnic Institute, 2Institute of General and Inorganic Chemistry AS RUz
Abstract. Background. The presence of organic compounds in industrial wastewater complicates the process of their purification to the suitability of their use in irrigated agriculture, which is important for arid zones.
Purpose: to develop a method for the purification of wastewater from an oil and gas enterprise from organic contaminants by the method of anodic electrooxidation.
Methodology. A laboratory non-diaphragm electrolyzer, IVS-1 direct current source, and PI-50-1 potentiostat were used. The presence of organic compounds in water was assessed according to GOST R55684-2013 (ISO 8467:1993) by permangonatometry and IND F 14.1:2:4.210-2005, by light transmission.
Originality. The degree of oxidation of organic compounds was determined in time, by light transmission and permanganatometry, as their electrochemical interaction with the surface of the anode and cathode.
Findings. The kinetic regularities of reactions of anodic and cathodic interaction of organic compounds in the waste water of the Mubarek Gas Processing Plant and in solutions of organic water-soluble dyes are revealed.
Key words: organic compounds, wastewater, direct current source, anode, cathode, electrooxidation.
Highlights:
- data on the composition of wastewater from a gas processing plant;
- method of electrolysis purification of water from organic impurities;
- visual result of the cleaning of dyes-indicators.
References
1. Damodhar Gaim, Prabir Ghosh. Removal of organic compounds present in wastewater by advanced electrochemical oxidation processes (review) // ELECTROCHEMISTRY. -2019. -Vol. 55. -No. 7. -P. 771–807. http://DOI:10.1134/S0424857019050050
2. Wang N., Zheng T., and Zhang G. A review on Fenton-like processes for organic wastewater treatment. // J. Environ. Chem. Eng. -2016. -Vol. 4. -Р. 762. http://DOI:10.1016/j.jece.2015.12.016
3. Huang X., Hou X., and Zhao J. Hematite facet confined ferrous ions as highly efficient Fenton catalysts to degrade organic contaminants by lowering H2O2 de composition energetic span. // Appl. Catal. B: Environ. -2016. -Vol. 181.-P. 127. http://DOI:10.1016/j.apcatb.2015.06.061
4. Alexandre, C., Luis, M., and Baginska, E., Degradation of 5-FU by means of advanced (photo) oxidation processes: UV/ H2O2, UV/Fe2+/ H2O2 and UV/TiO2 - Comparison of transformation products, ready biodegradability and toxicity. Sci. //Total Environ. -2015. -Vol. 528. -P. 232. http://DOI:10.1016/j.scitotenv.2015.04.111
5. Zhu H., Shen Z., and Tang Q. Degradation mechanism study of organic pollutants in ozonation process by QSAR analysis. // Chem. Eng. J. -2014. -Vol. 255. -P. 431. http://DOI:10.1016/j.cej.2014.05.073
6. Chelme-ayala P., Smith D.W., and Adams C.D. Oxidation kinetics of two pesticides in natural waters by ozonation and ozone combined with hydrogen peroxide. //Water Res. -2011. -Vol. 5. -P. 2517. http://DOI:10.1016/j.watres.2011.02.007
7. Fontmorin J. and Sillanpaa M. Bioleaching and combined bioleaching/Fenton-like processes for the treatment of urban anaerobically digested sludge: Removal of heavy metals and improvement of the sludge dewaterability, Sep. //Purif. Technol. -2015. -Vol. 156. -P. 655. http://DOI:10.1016/j.seppur.2015.10.061
8. Patent RU 2 129 529 C1. Method of water purification and device for its implementation. Application 9710294 0/025. Date of publication: 04/27/1999, applicant: Kokin Vadim Petrovich, Inventor: Kokin V.
9. Guro V.P., Ibragimova M.A., Yusupov F.M., Shamsiev Sh.J., Adinaev Kh.F., Abdikamalova A.B. Development of technology for electrolysis purification of water from hydrogen sulfide at Mubarek Gas Processing Plant LLC // Uzbek. chem. j. -2021.-No.3. - P. 3-10.
10. Utility Model Patent UZ FAP 02056 “Method for purifying water from sulfides” No. FAP 2021 0343 dated November 4, 2021, authors: Guro V.P., Yusupov F.M., Yodgorov N.I., Shamsiev Sh. J., Ibragimova M.A., Yusupov S.K., Kurbanov Zh. Kh.
11. Kurbanov Zh.Kh., Guro V.P., Yusupov F.M., Shamsiev Sh.J., Ibragimova M.A., Adinaev Kh.F. Treatment of wastewater from Mubarek Gas Processing Plant LLC from sulfide and organic compounds. // Uzbek. chem. j. -2022. -No. 2. – pp. 21-27.
12. Patent RU 178983 (13) U1 (Utility model). A device for treating wastewater from multi-component contaminants. Ignatkina D.O. (RU), Voytyuk A.A. (RU), Moskvicheva A.V. (RU), etc. Appl. 11/13/2017; Publ. 04/24/2018. Bull. No. 12.
13. A. Baeshov, A.E. Konurbaev, N.S. Ivanov, T. Gaipov. Application of lump electrodes for wastewater purification from organic compounds. // Bulletin of KazNU. Chemical series. - No. 4 (64). -2011. - P.27-31.
14. Patent RU 2033391. Method of treating wastewater from organic impurities and a device for its implementation. Authors Bozina N.A., Vorozheikin A.P., Galukhin V.A., Dudalova T.V., Liakumovich A.G., Sosnovskaya L.B., Uryadov V.G., Filimonov V.A. Patent holder Nizhnekamsk production association "Nizhnekamsk-neftekhim" Registration. Date of application: 07/15/1991 Date of publication 04/20/1995.
15. Patent for Utility model UZ FAP 02250 “Method of water purification from organic impurities”, No. FAP 2022 0137 dated April 22, 2022, authors: Guro V.P., Yusupov F.M., Shamsiev Sh.J., Kurbanov J.H.
To cite this article: G. H. Kurbanov, V. P. Guro, O. K. Raxmonov, M. A. Ibragimova, Z. A. Nabieva. Electrochemical purification of oil and gas enterprise wastewater from organic compounds // Uzbek chemical journal. -2023. – Nr4. - Pp.35-40.
Received: 15.08.2023; Accepted: 09.10.2023; Published: 20.10.2023
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UDK 661.183.12:549.67
А. R. Sultonov, Sh. T. Gulomov, G. A. Gashenko, M. P. Yunusov
PROPERTIES AND POSSIBLE APPLICATIONS OF WASTE ZEOLITE ADSORBENTS
Uzbek Scientific Research Chemical and Pharmaceutical Institute (UzKFITI), E-mail: yunusovmp@gmail.com
Abstract. Background. The study of spent zeolites, waste from oil and gas processing, is relevant due to the possibility of their disposal in agriculture while improving the structure of the soil.
Purpose: the possibility of obtaining components of soil structure formation, prolongation and dosing of microelements based on spent zeolites NaA, CA, CaA.
Methodology. Using the methods of X-ray fluorescence and IR analysis, the structure and composition of samples of CA adsorbents were studied, before and after two months of testing, with constant watering, in the soil.
Originality. Selection of a method for processing spent zeolite, without contact with atmospheric oxygen, use of products in soil compositions.
Finlings. It was established that during the experiment, Na+ ions do not pass into the soil; K+ ions are subject to ion exchange for Ca2+.
Key words: type A zeolites, regeneration, utilization of adsorbents, agriculture.
Highlights:
- spent zeolites NaA, KA, CaA, as a soil component;
- Na+ ions do not pass into the soil composition;
- K+ ions are subject to ion exchange for Ca2+ ions.
References
1. Patent No. 02565 dated December 13, 2004. Method for thermal destruction-oxidative regeneration of spent zeolites. Mansurova M. S., Makhkamov Kh. M. et al.
2. A. R. Sultanov. Study of zeolite adsorbents synthesized on the basis of kaolins from the Angren deposit. / A. R. Sultanov, G. A. Gashenko, Sh. T. Gulomov, M. I. Yunusov // Collection of reports and abstracts of the III International Scientific and Technical Conference “Innovative developments in the field of chemistry and technology of fuels and lubricants.” -Tashkent. -2019. -P. 163 - 165
3. Chemistry of zeolites and catalysis on zeolites / Edited by J. Rabo. - Moscow: Mir, 1980. - T. 1. - 504 p.
4. G. V. Tsitsishvili. Natural zeolites / G. V. Tsitsishvili, T. G. Andronikashvili, G. N. Kirov, L. D. Filizova. – Moscow: Chemistry, 1985.–223 p.
5. General purpose zeolites, molded with a binder. Technical specifications TU 38. 10281-88. Instead of TU 38. 10281-80; introduced in 1988, extended 02/16/1994. Salavat: Bashkir Center for Metrology and Standardization.
6. A. R. Sultanov. The use of local raw materials and technological waste in the synthesis of zeolite adsorbents-drying agents./A. R. Sultanov, G. A. Gashenko, N. F. Isaeva, Sh. T. Gulomov, M. P. Yunusov. // Collection of reports of the Republican Scientific and Technical Conference “Integration of science, education and production - the most important factor in the implementation of investment projects in the oil and gas industry."-Tashkent.-2019.-P. 304- 307
7. G. A Gashenko. Features of zeolite adsorbents obtained on the basis of Angren kaolins / G. A. Gashenko, U. Kh. Sayidov, Sh. Gulomov, Kh. A. Nasullaev, M. P. Yunusov // Journal "Chemical Industry". - St. Petersburg. -2018. -No. 3. – T. 95. -P. 109 –115
8. A. R. Sultanov. Development of technology for the production of import-substituting adsorbents based on local raw materials /A. R. Sultanov, M. P. Yunusov, Kh. A. Nasullaev, Sh. T. Gulomov, B. Zh. Mustafaev, G. A. Gashenko // Development of science and innovation. – 2019.-No. 4 .-P.52 – 59
9. D. Sh. Shakarova. Template synthesis of nanostructured zeolite A/D. Sh. Shakarova, A. B. Ibragimov. // Uzbek chemical journal. – 2023. - No. 1. – P. 34-40
10. V. I. Titova. Comparative study of the influence of zeolite and mineral fertilizers on the productivity of grain crops and agrochemical characteristics of light gray forest loamy soil / V. I. Titova, N. V. Zabegalov. //Soil science and agrochemistry. - No. 1(52). – 2014. – P. 190 – 198
11. N. I. Ryakhovskaya. Efficiency of using zeolite on potatoes in three-field crop rotation on light volcanic soils of Kamchatka /N. I. Ryakhovskaya, V. V. Gainatullina, N. A. Makarova // Fertility. - No. 2. – 2014. – P. 49 – 51
12. N. B. Beregovaya. Prospects for the recycling of spent NaX type zeolite of the Orenburg gas chemical complex / N. B. Beregovaya, V. V. Gerasimenko, S. A. Molchanov, M. M. Morozov // Bulletin of the Orenburg State University. - 2015. - No. 10 (185) .-P. 334 - 336
To cite this article: А. R. Sultonov, Sh. T. Gulomov, G. A. Gashenko, M. P. Yunusov. Properties and possible applications of waste zeolite adsorbents // Uzbek chemical journal. -2023. – Nr4. - Pp.40-48.
Received: 15.08.2023; Accepted: 02.10.2023; Published: 20.10.2023
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UDC:66.074+663.541.12:504.064.43
1O. YU. Aripdjanov, 2S. M. Turobjonov, 1SH. P. Nurullaev, 1SH. A. Azimova
ABSORBENT COMPOSITES BASED ON DEA AND MDEA AND USING WATER-SOLUBLE POLYELECTROLYTES
1Tashkent Institute of Chemical Technology, 2Tashkent State Technical University named after Islam Karimov
Abstract. Background. It is known that the composite absorbent DEA + AVRP, used at gas processing plants, remains effective after 1.5 months of operation.
Purpose. Improving the technology for purifying sulfur-containing natural and secondary gases using composite sorbents.
Methodology. The physicochemical properties of sorbents have been studied, their structure has been studied using IR spectroscopy, potentiometry, photocolorimetry, gas chromatography, thermogravimetry, and MSS.
Originality. A technology has been developed for the production of composite absorbents using synthesized polyelectrolytes based on bottom residues in the production of furan compounds with diethanolamine and methyldiethanolamine.
Findings. A new matrix of composite absorbents based on nitrogen-containing water-soluble polyelectrolytes, methylethanolamine, diethanolamine and methyldiethanolamine has been obtained.
Key words: diethanolamine, nitrogen-containing water-soluble polyelectrolytes, natural gas.
Highlights:
- AVRP reagent was synthesized using formaldehyde;
- modification of the absorbent at three mass values “water: DEA”.
References
1. https://neftegaz.ru . Energy of oil and gas production in Uzbekistan. - 2022.
2. V.I. Murin, N.N. Kislenko, Yu.V. Surkov. Technology of gas and condensate processing. Sp .: - M .: Nedra-Business Center LLC. -2002. - Part 1. - 517 p.
3. Nurmukhamedov Kh.S., Temirov O.Sh., Turobzhonov S.M., Yusupbekov N.R., 4. Zokirov S.G., Tadzhikhodzhaev Z.A. Natural gas processing technology, processes and apparatuses // Textbook for high school / ed. Academician of the 5. Academy of Sciences of the Republic of Uzbekistan N.R. Yusupbekov. – 2016. - 856 p.
4. Direction of development of the oil and gas processing industry. https://www.neftegaz-expo.ru/ru/articles/2016/gazopererabotka .
5. Dillon E.T. Gas purification by triazines. Report at a meeting of the Gas Processing Association. -San Antonio, USA.-1991
6. Dillon E.T. Patent RF 2080909, 1997. Published 1998.
7. Hartman V.L., Sukhoruchkina L.A., Boevskaya E.A., Shkitina V.I. Dynamics of Recrys-tallization of Zinc Oxide in an Industrial Hydrogen Sulfide Scavenger // Russian Conference "Scientific Basics of Catalyst Preparation and Technology" and V Russian Conference "Problems of Catalyst Deactivation." -Tuapse. -2008. Abstracts of reports, Novosibirsk-2008. -t. II. -Р. 27–28.
8. Yumura M., Furimsky E. Comparison of CaO, ZnO and Fe2O3 as H2S adsorbent at high temperatures // Ind. and Eng. Chem. Process Des. and Dev. -1985. -Vol.24,N4. -Рp. 1165–1168.
9. Danzig GA, Sharkin GA, Yakerson VI, Rybakova S.M. Thermodynamics of reactions for cleaning gases from sulfurous substances // J. prec. Chemistry. -1976. -N2. -Рp. 329-333.
10. Danzig GA, Vorontsova NF, Krutina SA, Danzig ML, Yakerson V.I. Determination of the sul-fur capacity of catalysts and sorbents by the dynamic method // Kinetics and catalysis. -1974. -T.15, N6. -Рp. 1601-1603.
11. Hartman V.L., Danzig GA, Kondrashchenko T.A. Dynamic quality indicators of sulfur treatment masses // J. prec. chemistry. -1982. -N2. -Рp. 358-361.
12. Daut V.A., Hartman V.L., Konovalov S.Ya., Tararyshkin M.V., Obysov A.V., Beskov V.S., Golosman E.Z. Experience in economical loading of the sulfur treatment unit of the methanol synthesis unit // Chemical industry. -2000. -N10. -Рp. 507-511.
13. Gartman V.L. Modeling of a two-layer sulfur treatment reactor. Sat. mater. // 1 All-Russian. scientific prakt. conf. "Resource saving and ecological development of territories. -Togliatti. -2017. -TSU. 2017. -Рp. 46-50.
14. V.L. Hartmann, Effect of sulphur removal catalyst granules properties on the commercial-scale bed macrokinetics // Chem. Eng. J. -107. -2005. -Рp. 39-43.
15. V.L. Hartmann, Gas–solid reaction modeling as applied to the fine desulfurization of gaseous feedstocks // Chem. Eng. J. -134. -2007. -190-194
To cite this article: O. YU. Aripdjanov, S. M. Turobjonov, SH. P. Nurullaev, SH. A. Azimova. Absorbent composites based on dea and mdea and using water-soluble polyelectrolytes // Uzbek chemical journal. -2023. – Nr4. - Pp.48-55.
Received: 15.08.2023; Accepted: 29.09.2023; Published: 20.10.2023
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UDC 551.461:631.82
F. D. Guliyev, A. G. Guliyev
USE OF SEA WATERAS FERTILIZER
Department of Soil Science and Agrochemistry, Azerbaijan National Academy of Sciences, Azerbaijan
Abstract. Background. Sea water is a major source in a case of nutrients and useful components for food, minerals, and other raw materials. Using seawater can be solved some issues concerning purification of it. Generally, seawater is of harmful ions and various type of microorganisms. Therefore it is needed to carry out methods purification of seawater in terms of using it as a precious substance. A reverse osmosis method is advanced one, which can treat seawater with high quality. However, a reverse osmosis is of disadvantage due to application semiconducting membranes and consumption of high energy. In tis a case, precipitation approach is cost effective and less consumption of energy in comparing with osmosis technology. In this paper precipitation method is offered to remove CI- and SO4-2 ions off the sea water
Purpose. The physical and chemical methods are utilized to make seawater as a fertilizer.
Methodology. There are determined that heavy metal cations and nonmetal ions according to upon MS-1669347-05-04 standard method. Heavy Metals such as Fe, Cd, Co, Cu. Ni, Pb, Zn were determined by means ICP-OES (inductively Coupled plasma-optical emission spectrometer). Whereas, the anions such as NO2-3 –N, total nitrogen, phosphates and total phosphorus were determined by means the device CECIL 4004 spectrophotometer.
Originality. The precipitation method is considered in order to remove large amount of CI-and SO4-2 using Pb(NO3)2. Using this method, it is conducted by doing the below mentionedcon versions. Stoichiometric consumption in amount of 100% is required to precipitate CI- and SO4-2 from metal containing salts.
Findings. As results, seawater can be used after removing ions more than 90%, which are harmful for plants.
Key words: оsmos, seawater; waterpurification, semiconductingmembranes, precipitation, irrigation, fertilization.
Highlights:
- CI- and SO4-2 ions were removed maximally using Pb(NO3)2 as precipitate;
- seawater after purification can be used in irrigation system as fertilizers.
References
1. Sekino M., Gotoh K., Janaga J., Nikko H., Matsunaga K. Reverse osmosis modules for water desalination // ChemEngProgr. -1985. -81(12). -Рp. 52-56.
2. Aly G All-Haddad, Abdel-Jawad M. Parametric study on falling- film sea water desalination. Desalinayion. -1987. -65. -Рp. 43-55.
3. Vinakov NA, Trofimov VN, Smirnov EM. Chelyabinsk branch of the All-Russian Research Institute of Water Supply Sewerage. Hydraulic structures and engineering geodesy. -1988
To cite this article: F. D. Guliyev, A. G. Guliyev. Use of sea wateras fertilizer // Uzbek chemical journal. -2023. – Nr4. - Pp.55-58.
Received: 26.09.2023; Accepted: 20.10.2023; Published: 20.10.2023
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ORGANIC CHEMISTRY
UDK 547.787.31
Z. Zh. Pulatova, I. S. Ortikov, B. Zh. Elmuradov
REACTIONS OF 3-METHYL-6-CHLOROSULFONYLBENZOXAZOLIN-2-ONE WITH SECONDARY HETEROCYCLIC AMINES
Institute of Chemistry of Plant Substances AS RUz, E-mail: 7ulhumor@gmail.com
Abstract. Background. The search for pharmacologically active heterocyclic compounds is relevant, as is the synthesis of effective biologically active drugs based on them. Research is being carried out on the synthesis of compounds of the benzoxazoline class.
Purpose: study of chlorosulfonylation reactions of 3-methylbenzoxazolin-2-one, development of the synthesis of new compounds from 3-methyl-6-chlorosulfonylbenzoxazolin-2-one.
Methodology. Reactions of selective 3-methyl-6-chlorosulfonylbenzoxazolin-2-one with substituted secondary cyclic amines were carried out in the presence of a solvent.
Originality. Amides of 3-methylbenzoxazolin-2-one-6-sulfonic acids were obtained in high yields. The structure of the synthesized substances was proven based on the results of IR, 1H and 13C NMR spectroscopy.
Findings. Methods for the synthesis of 6-chlorosulfonyl-3-methylbenzoxazolin-2-one and 3-methylbenzoxazolin-2-one-6-sulfamides are shown.
Key words: 6-chlorosulfonyl-3-methylbenzoxazolin-2-one, 3-methyl-6-(piperidin-1-yl-sulfonyl) benzoxazol-2-one, morpholine, 1H NMR.
Highlights:
- 6-chlorosulfonyl-3-methylbenzoxazolin-2-one was synthesized;
- electrophilic exchange reactions with various secondary amines;
- factors influencing the reaction and optimal conditions for its implementation;
- the structure of the products was proven by IR, 1H NMR spectroscopy.
References
1. K. Giyasov, B. Sapaev, L. T. Juraeva, G. S. Turaeva, I. Yu. Podkovyrov. Fungicidal activity of benzoxazolinone and benzoxazolinthione derivatives // DOI: 10.32786/2071-9485-2020-03-20
2. Priya R Modiya and Chhaganbhai N Patel. Synthesis and screening of antibacterial and antifungal activity of 5-chloro-1,3-benzoxazol-2(3 h)-one derivatives//Org Med Chem Lett. -2012; 2: 29. Published online 2012 Aug 1. doi: 10.1186/2191-2858-2-29
3. H. X. Wang , F. Liu.Examination of pineal indoles and 6-methoxy-2-benzoxazolinone for antioxidant and antimicrobial effects//Comp Biochem Physiol C Toxicol Pharmacol.-2001.-130(3):379-88. doi: 10.1016/s1532-0456(01)00264-2.
4. Aleksej Abramov, Thomas Hoffmann, Timo D. Stark, Linlin Zheng, Stefan Lenk, Richard Hammerl, Tobias Lanzl, Corinna Dawid, Chris-Carolin Schon, Wilfried Schwab, Alfons Gierl, Monika Frey. Engineering of benzoxazinoid biosynthesis in Arabidopsis thaliana//Metabolic and physiologicalchallenges. Phytochemistry.-2021.-92.-112947. https://doi.org/10.1016 /j.phytochem.2021.112947
5. Wouter J.C. de Bruijn, Harry Gruppen, Jean-Paul Vincken. Structure and biosynthesis of benzoxazinoids: Plant defence metabolites with potential as antimicrobial scaffolds. //Phytochemistry.- 2018. 155,233-243. https://doi.org/10.1016/j.phytochem.2018.07.005
6. Minglu Gao, Xi Gu, Timothy Satterlee, Mary V. Duke, Brian E. Scheffler, Scott E. Gold, Anthony E. Glenn. Transcriptomic Responses of Fusarium verticillioides to Lactam and Lactone Xenobiotics. // Frontiers in Fungal Biology.-2022. -3. https://doi.org/10.3389/ffunb.2022.923112
7. V. V. Gruzinsky, V. I. Danilova, T. N. Kopylova, P. I. Petrovich, E. Yu. Shishkina, Generation of radiation in the UV region of the spectrum on benzoxazoles // Quantum Electronics.-1980.-vol. 7 .-No. 6.-1180–1185 / http: www. mathnet.ru/rus/agreement,
8. Synthesis and Screening of Some Nvel 2-[5-(Substituted phenyl) [1,3,4]oxadiazol-2-yl]-benzoxazoles as Potential Antimicrobial Agents. // Juurnal of the Koran Chemical Sodety.-2013.-Vol 57.-N 2. http://dx.doi.org/10.5012/jkcs.2013.57.2.221
9. Kumar D., Kumar N.M., Sundaree S., Johnson E.O., Shah K. An expeditious synthesis and anti-cancer activity of novel 4-(3'-indolyl)oxazoles. // Eur. J. Med. Chem.-2010.-45.-1244-1249. https://doi.org/10.1016/j.ejmech.2009.12.024.
10. Chiacchio M.A., Lanza, G., Chiacchio U., Giofre S.V., Romeo R., Iannazzo D., Legnani L. Oxazole- based compounds as anticancer agents. // Curr. Med. Chem.-2019.-26, 7337-7371. https://doi.org/10.1097/CAD.0000000000000653.
11. Zhirnov V.V., Velihina Y.S, Mitiukhin O.P., Brovarets V.S. Intrinsic drug potential of oxazolo[5,4- djpyrimidines and oxazolo[4,5-d]pyrimidines. // Chem. Biol. Drug. Des.-2021.-98.-561-581. https://doi.org/10.1111/cbdd. 13911.
12. Joshi S., Bisht A.S., Juyal D. Systematic scientific study of 1,3-oxazole derivatives as a useful lead for pharmaceuticals: a review. // Pharm. Innov. J.-2017.-6, 109-117. https://dx.doi.org/10.22271/tpi.
13. Ryu C.K., Lee R.Y., Kim N.Y., Kim Y.H., Song A.L. Synthesis and antifungal activity of benzo[d]oxazole-4,7-diones // Bioorg. Med. Chem. Lett. -2009. –Vol.19. -Issue 20. –P.5924–5926.
14. Sondhi S.M., Singh N., Kumar A., Lozach O., Meijer L. Synthesis, antiinflammatory, analgesic and kinase (CDK-1, CDK-5 and GSK-3) inhibition activity evaluation of benzimidazole/benzoxazole derivatives and some Schiff’s bases // Bioorg. Med. Chem. -2006. –Vol.14. -Issue 11. –P.3758–3765.
15. Patent WO2011047390A3 (USA) / Smith P.J., Ward D.N. // Heterocyclic benzoxazole compositions as inhibitors of hepatitis С virus. Published on 21.04.2011.
16. Gordon A., Ford R. The Chemist's Companion. Physico-chemical properties, methods. -Moscow: -Mir, 1976. - 541 p.
17. Dushamov D.A. Study of the reaction of electrophilic substitution in the series of benzazolin-2-ones: Diss.... Ph.D. chem. Sci. -Tashkent, 2004.-131p..
To cite this article: Z. Zh. Pulatova, I. S. Ortikov, B. Zh. Elmuradov. Reactions of 3-methyl-6-chlorosulfonylbenzoxazolin-2-one with secondary heterocyclic amines // Uzbek chemical journal. -2023. – Nr4. - Pp.59-65.
Received: 26.09.2023; Accepted: 09.10.2023; Published: 20.10.2023
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ANALYTICAL CHEMISTRY
UDK 546.881.543.426.546
F. R. Allambergenova, N. H. Kutlimurotova, Z. A. Smanova, E. Berdimurodov
DEVELOPMENT OF A LUMINESCENT METHOD FOR DETECTION OF VANADIUM (V) IONS USING CARBON DOTS
National University of Uzbekistan
Abstract. Background. Vanadium is toxic both in the form of cations and anions, which requires control of its presence and concentration in media. The development of methods for its determination is relevant.
Purpose. To develop a method for detecting vanadium (V) ion by the luminescent property of a carbon dot based on chitosan and melamine.
Methodology. 1.0 ml of a solution of carbon dots and a standard solution of ammonium vanadate, distilled water are introduced into the cuvette and the absorption and luminescence spectra are measured (Horiba Duetta, Japan).
Originality. A sensitive luminescent method for detecting vanadium ions using carbon dots synthesized on the basis of chitosan and melamine has been developed.
Findings. Luminescent determination of V(V) using carbon dots has been implemented. The luminescence intensity was determined at λ=448 nm at the carbon point and 423 nm in the V(V) complex, which indicates the extinction of luminescence with the formation of the complex. The alkalinity of the medium was controlled.
Key words: vanadium (V) ion, chitosan, milamine, carbon point, luminescence.
Highlights:
- luminescent determination of V(V)-ion by carbon points;
- quantum yield decreases with decreasing pH;
- complexation of carbon points with vanadium ions.
References
1. Hu L. et al. Multifunctional carbon dots with high quantum yield for imaging and gene delivery // Carbon. – 2014.-Vol.67.-Р.508-513.
2. Rinaudo M. Chitin and chitosan: Properties and applications // Progress in polymer science. – 2006.-Vol.31.7.-Р. 603-632.
3. Stevens C. V. Chitin and chitosan: properties and applications. – 2019.-Р.1
4. Gedda G. et al. Green synthesis of carbon dots from prawn shells for highly selective and sensitive detection of copper ions // Sensors and Actuators B: Chemical. –2016. -Vol.224. -Р.396-403.
5. Inatova M.S., Alimova D.B., Smanova Z.A. Immobilized reagents for the determination of metal ions (Republic of Uzbekistan).// Journal. European research. -2016. -No. 2. -P.20-21.
6. Valfredo A.L., Luana B.S., Rosivan S.A. Deep eutectic solvent in ultrasound-assisted liquid-phase microextraction for determination of vanadium in food and environmental waters // Microchemical Journal. -2022. -Vol.180. -Р.220-222.
7. N.P. Milcheva, F. Genc, P.V. Racheva, V.B. Delchev, V. Andrush, K.B. Gavazov. An environmentally friendly cloud point extraction-spectrophotometric determination of trace vanadium using a novel reagents // Journal of Molecular liquids. -2021. -Vol.334,15.-Р.267-271.
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13. Souza V. S., Teixeira L. S. G., Bezerra M. A. Application of multivariate designs in the development of a method for vanadium determination in natural waters by HR-CS GF AAS after cloud-point extraction // Microchemical Journal. – 2016.- Vol.129.-Р.318-324.
14. Nunes L. S., Korn M. G. A., Lemos V. A. A novel direct-immersion single-drop microextraction combined with digital colorimetry applied to the determination of vanadium in water // Talanta. – 2021.- Vol.224. -Р.435-441
15. Korostelev P.P. (1964) Preparation of solutions for chemical analytical work. -M.: Book on Requirements. -440 p.
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To cite this article: F. R. Allambergenova, N. H. Kutlimurotova, Z. A. Smanova, E. Berdimurodov. Development of a luminescent method for detection of vanadium (V) ions using carbon dots // Uzbek chemical journal. -2023. – Nr4. - Pp.66-74.
Received: 08.07.2023; Accepted: 09.08.2023; Published: 20.10.2023
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UDK 669.884.546.34:553.677.4
1U. R. Akhmedova, 1N. Kh. Kutlimurotova, 2Z. Z. Yakhshieva, 2M. M. Sultonov
DEPOSITION OF LITHIUM IONS FROM SALT WATER WITH SODIUM HYDROPHOSPHATE
1National University of Uzbekistan, 2Jizzakh State Pedagogical University
Abstract. Background. Lithium salts are obtained mainly from lithium-containing minerals. But since the lithium content in them is extremely low, the actual problem is the search for new raw sources of lithium, among which some natural brines in Uzbekistan attract attention.
Purpose: To study the conditions of precipitation of lithium ions by sodium hydrogen phosphate from salt waters on the territory of Uzbekistan.
Methodology. Precipitation of lithium ion by sodium hydrogen phosphate from saline waters, determination of interfering factors by conductometry and densitometry.
Originality. A method has been developed for the precipitation of lithium ions from brines with sodium hydrogen phosphate at 60-70°C from a mixture of sodium, potassium, and magnesium ions.
Findings. It has been established that from 0.3 N (according to sodium and potassium ions) solutions, at temperatures above 35°C, and also above 60°C, lithium ions can precipitate in the form of lithium phosphate.
Key words: lithium phosphate, sodium hydrogen phosphate, lithium hydroxide, brine, electrical conductivity, density.
Highlights:
- method of precipitation of lithium ions from salt water using sodium hydrogen phosphate;
- complete precipitation of lithium ions in the form of phosphates at a temperature of 65-70°C;
- in aqueous solutions of lithium phosphate PC=1.578*10-4;
- in mixtures containing potassium and sodium ions PC=7.78*10-5 at 65-70°C;
- the effect of the primary salt effect is eliminated at high temperatures.
References
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To cite this article: U. R. Akhmedova, N. Kh. Kutlimurotova, Z. Z. Yakhshieva, M. M. Sultonov. Deposition of lithium ions from salt water with sodium hydrophosphate // Uzbek chemical journal. -2023. – Nr4. - Pp.74-83.
Received: 07.07.2023; Accepted: 09.08.2023; Published: 20.10.2023
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UDK 661.691.661.8472
1K. E. Donieva, 1Z. A. Smanova, 1D. A. Ziyaev, 2E. T. Doniev
METHODS FOR DETERMINING SELENIUM AND ZINC IONS IN COTTON HUSKS AND MEAL
1National University of Uzbekistan named after Mirzo Ulugbek, Tashkent, 100095 Uzbekistan, 2Karshi Institute of Engineering and Economics, Karshi, sq. Mustakillik, 225, e-mail: donievakamola@gmail.com
Abstract. Background. In livestock farming, the balance of feed and diet, including macro-, microelements and vitamins, is important. This is facilitated by control of microelements in feed.
Purpose. Determination of selenium and zinc content in husks and meal using SEM and X-ray fluorescence analysis.
Methodology. SEM “JEOLJSM – IT200 LA”, X-ray fluorescence analyzer “SpectraXEPOSX-ray” and optical spectroscopy devices were used.
Originality. Data were obtained to select the optimal method for detecting selenium and zinc in animal feed.
Findings. The sensitivity of X-ray fluorescence analysis and SEM methods with respect to selenium and zinc in meal husks was revealed. A method for its enrichment with microelements has been developed.
Key words: scanning electron microscopy, x-ray fluorescence, selenium, zinc, animal feed, husk, meal.
Highlights:
- comparative characteristics of the analysis of selenium and zinc by different methods;
- scanning electron microscopy and X-ray fluorescence analysis;
- determination of selenium and zinc in husks and meal.
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To cite this article: K. E. Donieva, Z. A. Smanova, D. A. Ziyaev, E. T. Doniev. Methods for determining selenium and zinc ions in cotton husks and meal // Uzbek chemical journal. -2023. – Nr4. - Pp.83-91.
Received: 04.10.2023; Accepted: 19.10.2023; Published: 20.10.2023
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