Russian Chemical Bulletin最新文献_第10页

Microgels based on carboxymethylcellulose as multifunctional carriers for immobilization of inhibitor and activator of inducible NO synthase 羧甲基纤维素微凝胶作为多功能载体固定化诱导型NO合成酶抑制剂和活化剂

IF 1.7 4区化学

Russian Chemical Bulletin Pub Date : 2025-03-25 DOI: 10.1007/s11172-025-4520-y

A. S. Zolotova, M. A. Orlova, V. V. Spiridonov, T. P. Trofimova, A. Yu. Lupatov, A. A. Yaroslavov, S. N. Kalmykov

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Reactions of hexamethylenetetramine with (1-hydroxyethylidene)diphosphonic acid and its salts. Molecular structure of diammonium (1-hydroxyethylidene)diphosphonate 六亚甲基四胺与（1-羟乙基）二膦酸及其盐类的反应。二膦酸二铵（1-羟乙基乙烯）的分子结构

IF 1.7 4区化学

Russian Chemical Bulletin Pub Date : 2025-03-25 DOI: 10.1007/s11172-025-4508-7

V. V. Semenov, N. V. Zolotareva, B. I. Petrov, N. M. Lazarev, R. V. Rumyantsev, T. I. Lopatina, N. M. Khamaletdinova, T. I. Kulikova, T. A. Kovylina, E. N. Razov

{"title":"Reactions of hexamethylenetetramine with (1-hydroxyethylidene)diphosphonic acid and its salts. Molecular structure of diammonium (1-hydroxyethylidene)diphosphonate","authors":"V. V. Semenov, N. V. Zolotareva, B. I. Petrov, N. M. Lazarev, R. V. Rumyantsev, T. I. Lopatina, N. M. Khamaletdinova, T. I. Kulikova, T. A. Kovylina, E. N. Razov","doi":"10.1007/s11172-025-4508-7","DOIUrl":"10.1007/s11172-025-4508-7","url":null,"abstract":"<div>The reaction of hexamethylenetetramine (CH2)6N4 with sparingly soluble (1-hydroxyethylidene)diphosphonates M(H2L)•2H2O (M = Mn, Co, Zn; H4L is (1-hydroxyethylidene)diphosphonic acid) afforded water-soluble compounds of the composition [(CH2)6N4H2]ML•2H2O (M = Mn (1), Co (2), Zn (3)). Manganese derivative 1 lost its solubility during storage, whereas the cobalt and zinc compounds retained it. The tetrafunctional base hexamethylenetetramine reacts with tetrafunctional (1-hydroxyethylidene)-diphosphonic acid H4L in methanol to form hexamethylenetetraminium (1-hydroxyethylidene)diphosphonate dihydrate [(CH2)6N4H]+(H3L)•2H2O (4). When heated in an aqueous methanol medium, compound 4 dissociates to acid H4L and base (CH2)6N4, hexamethylenetetramine reacts with water to produce ammonia and formaldehyde, and the acid H4L and ammonia generate diammonium (1-hydroxyethylidene)diphosphonate (NH4)2H2L. The heating in an inert atmosphere causes the extensive decomposition of compound 4 giving a non-volatile water-soluble residue and a series of volatile organic compounds, such as amines, amides, amino alcohols, and amino acids. The obtained compounds were studied by IR spectroscopy, elemental analysis, powder X-ray diffraction, and thermogravimetric analysis. The molecular structure of diammonium (1-hydroxyethylidene)diphosphonate (NH4)2H2L was determined.</div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 1","pages":"125 - 136"},"PeriodicalIF":1.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Peculiarities of phase formation in the Cs2O—Al2O3—SiO2 system prepared from precursors obtained by hydrothermal synthesis 利用水热合成法获得的前驱体制备的 Cs2O-Al2O3-SiO2 系统中相形成的特殊性

IF 1.7 4区化学

Russian Chemical Bulletin Pub Date : 2025-03-25 DOI: 10.1007/s11172-025-4499-4

A. V. Fedorova, O. N. Pestova, A. A. Selyutin, V. L. Stolyarova

{"title":"Peculiarities of phase formation in the Cs2O—Al2O3—SiO2 system prepared from precursors obtained by hydrothermal synthesis","authors":"A. V. Fedorova, O. N. Pestova, A. A. Selyutin, V. L. Stolyarova","doi":"10.1007/s11172-025-4499-4","DOIUrl":"10.1007/s11172-025-4499-4","url":null,"abstract":"<div>Peculiarities of phase formation in the ternary oxide system Cs2O—Al2O3—SiO2 have been studied using samples prepared from precursors obtained by hydrothermal synthesis followed by calcination of the reaction mixtures at different temperatures for different times. The samples were identified by high-resolution X-ray powder diffraction (HRXPD), simultaneous thermal analysis, and X-ray fluorescence spectroscopy. A HRXPD study revealed that all the samples contained an X-ray amorphous phase and crystalline phases. According to HRXPD data, the crystalline phases in the samples with the compositions Cs2O : Al2O3 : SiO2 = 33.0 : 33.0 : 33.0 and 30.0 : 50.0 : 20.0 (mol.%) corresponded to cesium aluminosilicate CsAlSiO4, while those in the sample containing equimolar amounts of the oxides corresponded to CsAlO2, CsAlSiO4, and Cs2CO3·3H2O formed on the surface of the sample. An X-ray fluorescence spectroscopy study demonstrated that the elemental composition of the heat-treated samples remains close to the intended stoichiometric composition.</div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 1","pages":"58 - 65"},"PeriodicalIF":1.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Synthesis of bridged azaheterocycles peri-annulated to the indole core 桥接吲哚核心的杂杂环的合成

IF 1.7 4区化学

Russian Chemical Bulletin Pub Date : 2025-03-25 DOI: 10.1007/s11172-025-4504-y

S. M. Antropov, S. A. Tokmacheva, I. I. Levina, I. V. Trushkov

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Mesomorphism of azomethine luminophores. X-ray diffraction and differential scanning calorimetry studies of 4′-butyl-4-propyloxysalicylideneaniline 偶氮亚甲基发光体的介形性。4′-butyl-4-propyloxalicylideneaniline 的 X 射线衍射和差示扫描量热法研究

IF 1.7 4区化学

Russian Chemical Bulletin Pub Date : 2025-03-25 DOI: 10.1007/s11172-025-4498-5

L. G. Kuz’mina, P. Kalle, B. M. Bolotin

{"title":"Mesomorphism of azomethine luminophores. X-ray diffraction and differential scanning calorimetry studies of 4′-butyl-4-propyloxysalicylideneaniline","authors":"L. G. Kuz’mina, P. Kalle, B. M. Bolotin","doi":"10.1007/s11172-025-4498-5","DOIUrl":"10.1007/s11172-025-4498-5","url":null,"abstract":"<div>The structure and photophysical properties of the luminophore 4′-butyl-4-propyloxysalicylideneaniline (1) were studied by X-ray diffraction analysis and differential scanning calorimetry. At room temperature, compound 1 does not luminesce. According to the DSC data, compound 1 undergoes a crystal—mesophase phase transition at 54.1 °C and it melts at 68.4 °C, being transformed into an isotropic melt. When cooled to 67.9 °C, the isotropic melt becomes turbid due to the formation of a mesophase. A yellow fluorescence of the sample is achieved under UV irradiation, it intensifies on further cooling, persists at room temperature for about a week, and then fades. The mechanical action triggers the growth of luminescent crystals (1′). The X-ray diffraction study of original non-luminescent crystal 1 and luminescent crystal 1′ demonstrated that they are structurally identical. The possible cause of the difference in the photophysical properties of crystals 1 and 1′ is discussed. It is based on dynamic processes leading to a shift of the prototropic equilibrium toward either the benzenoid or quinoid configuration of the bonds in the azomethine moiety.</div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 1","pages":"49 - 57"},"PeriodicalIF":1.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Sorption of copper and NO synthase effectors on hydroxyapatite and effect of bovine serum albumin on the sorption process 铜和NO合成酶效应器在羟基磷灰石上的吸附及牛血清白蛋白对吸附过程的影响

IF 1.7 4区化学

Russian Chemical Bulletin Pub Date : 2025-03-25 DOI: 10.1007/s11172-025-4521-x

A. S. Zolotova, T. P. Trofimova, A. V. Severin, M. A. Orlova

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Synthesis of N,N-dimethylaminoalkyl esters of butanoic and pentanoic acids and study of their activity in the polymerization reaction of diglycidyl ethers 丁酸和戊酸N，N-二甲氨基烷基酯的合成及其在二缩水甘油醚聚合反应中的活性研究

IF 1.7 4区化学

Russian Chemical Bulletin Pub Date : 2025-03-25 DOI: 10.1007/s11172-025-4512-y

M. A. Barabanov, V. A. Osipova, A. V. Mekhaev, O. V. Koryakova, D. I. Vichuzhanin, S. V. Smirnov, A. V. Pestov

{"title":"Synthesis of N,N-dimethylaminoalkyl esters of butanoic and pentanoic acids and study of their activity in the polymerization reaction of diglycidyl ethers","authors":"M. A. Barabanov, V. A. Osipova, A. V. Mekhaev, O. V. Koryakova, D. I. Vichuzhanin, S. V. Smirnov, A. V. Pestov","doi":"10.1007/s11172-025-4512-y","DOIUrl":"10.1007/s11172-025-4512-y","url":null,"abstract":"<div>A number of dimethylaminoalkyl esters of butanoic and pentanoic acids were obtained by the acylation reaction of N,N-dimethylaminoalkanols. 3-(Dimethylamino)propyl butanoate, 3-(dimethylamino)ethyl- and 2-(dimethylamino)propyl pentanoates are described for the first time. The structures of all synthesized compounds are confirmed by NMR spectroscopy and elemental analysis. 2-(Dimethylamino)ethyl pentanoate and 3-(dimethylamino)propyl pentanoate are obtained in 66% yield. It was found using the data of DTA, FTIR spectroscopy, as well as taking into account the value of the gel-fraction content in the cured compositions, that with a decrease in the length of the hydrocarbon fragment linked to nitrogen and oxygen atoms, and with an increase in the total nitrogen content in the amino ester molecule, the activity in the epoxy resin curing reaction increases. An assessment of the bonding strength of St3 steel and aluminum alloy D16 with ED-20 epoxy resin cured with amino esters demonstrated that all synthesized compounds provide more effective bonding than the standard polyethylene polyamine hardener.</div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"74 1","pages":"166 - 170"},"PeriodicalIF":1.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Reactions of phosphonium-iodonium ylides with alkynes as a process of targeted synthesis of phosphorus-containing heterocycles: photoinduction and assistance of dipolarophiles 磷-碘吡啶与炔的反应定向合成含磷杂环：光诱导和亲偶极试剂的辅助

IF 1.7 4区化学

Russian Chemical Bulletin Pub Date : 2025-03-25 DOI: 10.1007/s11172-025-4511-z

I. D. Potapov, A. S. Nenashev, I. I. Levina, Yu. V. Timchenko, I. A. Rodin, I. A. Shutkov, A. A. Nazarov, G. M. Kuramshina, M. V. Motyakin, T. D. Nekipelova, T. A. Podrugina

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Electrochemical separation of pure hydrogen from hydrogen-containing mixtures 用电化学方法从含氢混合物中分离纯氢

IF 1.7 4区化学

Russian Chemical Bulletin Pub Date : 2025-03-25 DOI: 10.1007/s11172-025-4497-6

S. D. Badmaev, V. D. Belyaev, P. V. Snytnikov, V. A. Sobyanin

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Synthesis of 1-(2-chloroethoxy-2-oxo)-3,3-dimethyltriaz-1-ene 2-oxide and some of its properties 1-（2-氯乙氧基-2-氧基）-3,3-二甲基三氮杂-1-烯2-氧化物的合成及其一些性质

IF 1.7 4区化学

Russian Chemical Bulletin Pub Date : 2025-03-25 DOI: 10.1007/s11172-025-4500-2

P. B. Gordeev, G. A. Smirnov

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