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Synthesis and Structural Features of 3(5)-alkyl(aryl)-5(3)-pyridyl-4-nitroso-1Н-pyrazoles 3(5)-烷基(芳基)-5(3)的合成及结构特征-pyridyl-4-nitroso-1Н-pyrazoles
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2021-06-01 DOI: 10.17516/1998-2836-0230
Darya S. Volkova, Anna S. Kositsyna, Alexey A. Kukushkin, E. V. Root
{"title":"Synthesis and Structural Features of 3(5)-alkyl(aryl)-5(3)-pyridyl-4-nitroso-1Н-pyrazoles","authors":"Darya S. Volkova, Anna S. Kositsyna, Alexey A. Kukushkin, E. V. Root","doi":"10.17516/1998-2836-0230","DOIUrl":"https://doi.org/10.17516/1998-2836-0230","url":null,"abstract":"А para-chlorophenyl substituent was firstly obtained into the structure of pyridyl-substituted 4-nitrosopyrazole by cyclocondensation of hydrazine hydrate with the corresponding isonitroso-β-dicarbonyl compounds. The structure of previously unknown 3(5)-(4-chlorophenyl)-5(3)-pyridine-(3(4))-yl-4-nitroso-1H-pyrazoles and previously obtained 3(5)-alkyl(aryl)-5(3)-pyridine-(3(4))-yl-4-nitroso-1H-pyrazoles is proved and studied in detail by modern methods of analysis: mass spectrometry, 1H- and 13C NMR-spectroscopy","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85682534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bromobenzoylation of Methyl α-D-Mannopyranoside: Synthesis and Spectral Characterization 甲基α- d -甘露吡喃苷的溴苯甲酰化:合成及光谱表征
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2021-06-01 DOI: 10.17516/1998-2836-0226
F. Yasmin, M. R. Amin, Anowar Hosen, M. Sarkar
{"title":"Bromobenzoylation of Methyl α-D-Mannopyranoside: Synthesis and Spectral Characterization","authors":"F. Yasmin, M. R. Amin, Anowar Hosen, M. Sarkar","doi":"10.17516/1998-2836-0226","DOIUrl":"https://doi.org/10.17516/1998-2836-0226","url":null,"abstract":"The widening importance of carbohydrate derivatives as unrivaled potential antimicrobial and therapeutic drugs has attracted attentionto the synthesis of mannopyranoside derivatives. In the present study, regioselective 3-bromobenzoylation of methyl α-D-mannopyranoside (1) was carried out using the direct method and gave the corresponding 6-O-(3-bromobenzoyl) derivative (2) in excellent yield. A number of 2,3,4-tri-O-acyl derivatives (3–10) of this 6-substitution product using a wide variety of acylating agents were also prepared in order to obtain newer derivatives of synthetic and biological importance. The chemical structures of the newly synthesized compounds were ascertained by analyzing their physicochemical, elemental, and spectroscopic data. Additionally, the X-ray powder diffraction (XRD) of these acylated products was studiedfor quantitatively identifying crystalline compounds.Therefore, due to the importance of carbohydrates, it might be useful to develop a good method for the synthesis of carbohydrate-based drugs of the current global situation for health and disease","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84095036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
Obtaining Bismuth-Potassium-Ammonium Citrate by Interaction of Bismuth Oxide with Potassium and Ammonium Citrates Solutions 氧化铋与柠檬酸钾和柠檬酸铵溶液相互作用制备铋-钾-柠檬酸铵
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2021-06-01 DOI: 10.17516/1998-2836-0233
E. S. Koledova, Alina A. Artamonova, Y. Yukhin
{"title":"Obtaining Bismuth-Potassium-Ammonium Citrate by Interaction of Bismuth Oxide with Potassium and Ammonium Citrates Solutions","authors":"E. S. Koledova, Alina A. Artamonova, Y. Yukhin","doi":"10.17516/1998-2836-0233","DOIUrl":"https://doi.org/10.17516/1998-2836-0233","url":null,"abstract":"The interaction of bismuth oxides of various morphologies with aqueous solutions of potassium and ammonium citrates has been studied by methods of X-ray phase, chemical analyzes and electron microscopy, and the conditions for the formation of bismuth-potassium-ammonium bismuth citrate have been determined","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86343822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Synthesis and Physicochemical Study of Xanthan Butyl Ether 黄原胶丁基醚的合成及理化研究
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2021-06-01 DOI: 10.17516/1998-2836-0223
A. Kazachenko, O. Fetisova, A. V. Antonov, G. Bondarenko, V. V. Sychev
{"title":"Synthesis and Physicochemical Study of Xanthan Butyl Ether","authors":"A. Kazachenko, O. Fetisova, A. V. Antonov, G. Bondarenko, V. V. Sychev","doi":"10.17516/1998-2836-0223","DOIUrl":"https://doi.org/10.17516/1998-2836-0223","url":null,"abstract":"Xanthan is an important polysaccharide widely used in many industrial fields. It is produced by the bacteria Xanthomonascampestris. Chemical modification of xanthan can open up new horizons for its use. In this work, xanthan butyl ester was obtained for the first time by the interaction of xanthan and bromobutane using sodium hydroxide as a catalyst. The composition and structure of the obtained new xanthan derivative was studied by elemental analysis, IR spectroscopy, X-ray phase analysis, scanning electron microscopy and thermal analysis. The introduction of a butyl group into the xanthan molecule was proved by elemental analysis and IR spectroscopy by the appearance of corresponding bands. It was shown by X-ray phase analysis that xanthan butyl ether has a more X-ray amorphous structure in comparison with the original xanthan. It was shown by scanning electron microscopy that xanthan butyl ether powder consists of particles of a larger size and a layered structure in comparison with the original xanthan. It has been shown by thermal analysis that xanthan butyl ether is less thermostable than the starting xanthan","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80684554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Dielectric Properties Bi₂MgTaNbO₉ 介电性能Bi₂MgTaNbO₉
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2021-06-01 DOI: 10.17516/1998-2836-0228
N. Sekushin, N. Zhuk
{"title":"Dielectric Properties Bi₂MgTaNbO₉","authors":"N. Sekushin, N. Zhuk","doi":"10.17516/1998-2836-0228","DOIUrl":"https://doi.org/10.17516/1998-2836-0228","url":null,"abstract":"A phase-pure mixed oxide of the composition Bi2MgNbTaO9 with a pyrochlore structure was obtained by the ceramic synthesis method. The sample was characterized by the methods of X-ray phase and EDS analyzes, electron scanning microscopy. The electrical properties of samples of different thicknesses were investigated by impedance spectroscopy. The unit cell parameter is a = 1.0544 nm (sp. gr. Fd3m). As a result of modeling the impedance hodographs, an equivalent circuit is proposed that satisfactorily describes the electrical behavior of the sample. Bi2MgNbTaO9 is characterized by a high activation energy of 1.28 eV; moderately high dielectric constant ~62–71 and dielectric loss tangent ~0.003 at 1 MHz and 18 °С. No ionic transfer was detected. The investigated ceramics can be used to create multilayer ceramic capacitors","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81932304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effect of Physical Fields on Highly Resinous Oil 物理场对高树脂油的影响
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2021-06-01 DOI: 10.17516/1998-2836-0231
I. V. Loskutova, A. Morozova, G. Volkova
{"title":"Effect of Physical Fields on Highly Resinous Oil","authors":"I. V. Loskutova, A. Morozova, G. Volkova","doi":"10.17516/1998-2836-0231","DOIUrl":"https://doi.org/10.17516/1998-2836-0231","url":null,"abstract":"This paper studies the effect of physical fields (i.e. ultrasonic and constant magnetic fields) on structural and energy properties (viscosity, limiting shear stress, pour point, activation energy of viscous flow) as well as kinetic (antioxidant) properties of highly resinous problematic oil. The results were obtained via viscometry, determining of pour point and voltammetric method of oxygen electroreduction. It was shown that the treatment of studied oil by acoustic and magnetic fields lead to decrease in viscosity and temperature parameters. Combined treatment displays an additional reduction of viscosity and pour point","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88345456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Methods of Chemical and Thermochemical Processing of Hydrolytic Lignin 水解木质素的化学及热化学处理方法
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2021-06-01 DOI: 10.17516/1998-2836-0236
I. Sudakova, A. Levdansky, B. Kuznetsov
{"title":"Methods of Chemical and Thermochemical Processing of Hydrolytic Lignin","authors":"I. Sudakova, A. Levdansky, B. Kuznetsov","doi":"10.17516/1998-2836-0236","DOIUrl":"https://doi.org/10.17516/1998-2836-0236","url":null,"abstract":"The analysis of the latest publications on the use of hydrolytic lignin, which is a large-tonnage waste of wood chemical processing, was carried out. In its original form, the hydrolytic lignin is used as fuel, fuel briquettes and pellets, binders and adhesives, organic fertilizers, fillers and enterosorbents. The processing of hydrolytic lignin by chemical and thermochemical methods allows to significantly expand the range of valuable products obtained from it. They are used in chemical, oil and gas and construction industries, metallurgy and other areas. Hydrolytic lignin is most widely used for the production of carbon sorbents. Recently, methods of thermochemical processing of lignin into porous carbon materials with the required texture and strength characteristics as well as into valuable organic products have been developed","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79169507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Pore Characteristics and Adsorption Properties of Activated Carbon Produced from Ampelodismos Mauritanicus Stems 毛利藤茎活性炭的孔隙特性及吸附性能研究
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2021-06-01 DOI: 10.17516/1998-2836-0225
A. Benhathat, M. Amrani
{"title":"Pore Characteristics and Adsorption Properties of Activated Carbon Produced from Ampelodismos Mauritanicus Stems","authors":"A. Benhathat, M. Amrani","doi":"10.17516/1998-2836-0225","DOIUrl":"https://doi.org/10.17516/1998-2836-0225","url":null,"abstract":"In this paper, the synthesis and characterization of Ampelodesmos mauritanicus stems activated carbon (AMSAC) were studied. The produced activated carbon by phosphoric acid activation followed carbonisation was characterized by N2 adsorption-desorption isotherm, scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) analysis, and Fourier transform infrared (FTIR) spectroscopy. Sorption potential of AMSAC for the removal of methylene bleu from water was investigated. The experimental data found that AMSAC had high Brunauer-Emmett-Teller (BET) surface area of 1293 m2/g and abundant pores with specific volume of 1.23 m3/g. FTIR analysis reveals various functional groups on the surface of AMSAC which can be play an important role for the adsorption process. Langmuir isotherm model fitted well the equilibrium data for the methylene bleu comparing to the Freundlich isotherm model; the monolayer sorption capacity of AMSAC was found to be 411.8 mg/g at 25 °C","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91263643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Change in the Structure of Asphaltene Macromolecules of the Krapivinskoye Oil Field During Biological Oxidation 克拉比文斯科油田生物氧化过程中沥青质大分子结构的变化
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2021-06-01 DOI: 10.17516/1998-2836-0234
Tatyana V. Cheshkova, T. A. Sagachenko, R. Min, Dmitriy A. Philatov
{"title":"Change in the Structure of Asphaltene Macromolecules of the Krapivinskoye Oil Field During Biological Oxidation","authors":"Tatyana V. Cheshkova, T. A. Sagachenko, R. Min, Dmitriy A. Philatov","doi":"10.17516/1998-2836-0234","DOIUrl":"https://doi.org/10.17516/1998-2836-0234","url":null,"abstract":"Using physico-chemical methods of research (elemental analysis, infrared spectroscopy, selective chemical destruction of sulfide and ester bonds, chromatomass spectrometry) the influence of biodegradation processes on the composition and structure of asphaltenes of light oil at the Krapivinskoye deposit was studied. The results of comparative characteristics of initial asphaltenes and asphaltenes after biodestruction are presented. Attention is paid to studying their structural parameters and composition of fragments bound in asphaltene molecules through ester and sulfide bridges. It has been shown that microbial oxidation of asphaltenes of light oil by aboriginal soil microflora (laboratory experiment) occurs through a series of catalytic processes with formation of intermediate products of transformation – alcohols, aldehydes, ketones and fatty acids. It has been established that “grey and ether-bound” fragments in asphaltene molecules of biodegradable oil differ from “bound” compounds in the structure of the original asphaltenes with the qualitative composition of saturated and aromatic hydrocarbons and heteroatomic components","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87534008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mercury Speciation in Natural and Mining-Related Systems 自然和采矿相关系统中的汞形态
IF 0.4
Journal of Siberian Federal University. Chemistry Pub Date : 2021-06-01 DOI: 10.17516/1998-2836-0227
M. A. Gustaytis, I. N. Myagkaya, V. Malov, E. Lazareva, O. Shuvaeva
{"title":"Mercury Speciation in Natural and Mining-Related Systems","authors":"M. A. Gustaytis, I. N. Myagkaya, V. Malov, E. Lazareva, O. Shuvaeva","doi":"10.17516/1998-2836-0227","DOIUrl":"https://doi.org/10.17516/1998-2836-0227","url":null,"abstract":"Mercury speciation and the composition of mercury phases in natural and mining-related environments is studied by the thermal release analysis combined with electrothermal atomic absorption spectroscopy (TA-ET-AAS), as well as scanning electron microscopy with energy-dispersive X-ray microanalysis (SEM-EDS). The analyses are applied to laboratory-made samples bearing mercury selenide and to field samples from sites known for relatively high natural or industrially induced Hg background. They are, namely, material from the dispersion train of the Ursk sulfide tailings (Ursk Village, Kemerovo region) and debris precipitated from snow sampled in the Kurai mercury zone (Aktash Village, Gorny Altai). The TA-ET-AAS method works well in discrimination and identification of Hg sulfide and Hg selenide provided that the samples contain sufficient amounts of both compounds, but the sum HgS + HgSe can be determined at any contents of the two compounds. The presence of both mercury sulfide and mercury selenide in the samples has been confirmed by SEM-EDS microanalysis. The temperature ranges for the mercury species (Hg2+; HgS+HgSe mixture; mercury bound with organic matter (Hg-OM), including CH3Hg+) are identical in the laboratory and field samples. Therefore, the suggested approach can ensure fast and reliable detection of Hg phases in rocks exposed to supergene alteration","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72420045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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