发布求助
文献互助 智能选刊 最新文献

Theoretical and Experimental Chemistry最新文献

筛选
英文 中文
Localization of Hydrophobized Coumarin and Xanthene Acid–Base Indicators in Micelles 疏水性香豆素和杂蒽酸碱指示剂在胶束中的定位
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2022-10-08 DOI: 10.1007/s11237-022-09734-5
V. S. Farafonov, A. V. Lebed, N. O. Mchedlov-Petrossyan
{"title":"Localization of Hydrophobized Coumarin and Xanthene Acid–Base Indicators in Micelles","authors":"V. S. Farafonov,&nbsp;A. V. Lebed,&nbsp;N. O. Mchedlov-Petrossyan","doi":"10.1007/s11237-022-09734-5","DOIUrl":"10.1007/s11237-022-09734-5","url":null,"abstract":"<div><div><p>Specific features of the localization of coumarin and xanthene dye molecules in ionic surfactant micelles of sodium n-dodecyl sulphate and cetyltrimethylammonium bromide have been studied by molecular dynamics simulation. It is shown that the change in the microenvironment of a dye molecule in a micelle after its protonation (deprotonation) depends on both the nature of such a dye and the sign of the micelle charge. It was established that the presence of a long hydrocarbon chain in a dye molecule does not prevent its movement during (de)protonation.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4359695","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}
引用次数: 3
Photocatalytic Evolution of Hydrogen from Alcohol–Aqueous Solutions using Nanocrystalline Carbon Nitride Modified with Magnesium Chloride Under the Visible Light Irradiation 用氯化镁修饰的纳米晶氮化碳在可见光下催化醇水溶液中析氢
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2022-10-08 DOI: 10.1007/s11237-022-09736-3
G. Ya. Grodzyuk, K. V. Koryakina, V. V. Shvalagin, G. V. Korzhak, S. Ya. Kuchmiy
{"title":"Photocatalytic Evolution of Hydrogen from Alcohol–Aqueous Solutions using Nanocrystalline Carbon Nitride Modified with Magnesium Chloride Under the Visible Light Irradiation","authors":"G. Ya. Grodzyuk,&nbsp;K. V. Koryakina,&nbsp;V. V. Shvalagin,&nbsp;G. V. Korzhak,&nbsp;S. Ya. Kuchmiy","doi":"10.1007/s11237-022-09736-3","DOIUrl":"10.1007/s11237-022-09736-3","url":null,"abstract":"<div><div><p>Samples of nanocrystalline graphite-like carbon nitride (CGCN) modified with magnesium chloride have been obtained. The synthesized Mg-CGCN samples have been characterized by UV and IR spectroscopies, X-ray diffraction, energy dispersive X-ray analysis, and scanning electron microscopy. It is found that Mg-CGCN exhibits 60% higher photocatalytic activity in the reaction of hydrogen evolution from aqueous ethanol solutions under visible light than undoped CGCN. This may be related to a change in electrophysical characteristics (potentials of allowed bands) resulting from the incorporation of Mg<sup>2+</sup> ions into the CGCN structure, improved dissociation of photogenerated charges, and inhibition of their recombination.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4360622","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}
引用次数: 0
Homo- and Heteronuclear Cobalt(III)-Based Complexes with 2-Methoxy-6-[(Methylimino)Methyl]Phenol: Structure and Antioxidant Properties 2-甲氧基-6-[(甲基)甲基]苯酚的同核和异核钴基配合物:结构和抗氧化性能
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2022-10-07 DOI: 10.1007/s11237-022-09738-1
V. N. Kokozay, E. V. Polunkin, O. Yu. Vassilyeva, T. M. Kameneva, V. S. Pilyavskiy, B. W. Skelton
{"title":"Homo- and Heteronuclear Cobalt(III)-Based Complexes with 2-Methoxy-6-[(Methylimino)Methyl]Phenol: Structure and Antioxidant Properties","authors":"V. N. Kokozay,&nbsp;E. V. Polunkin,&nbsp;O. Yu. Vassilyeva,&nbsp;T. M. Kameneva,&nbsp;V. S. Pilyavskiy,&nbsp;B. W. Skelton","doi":"10.1007/s11237-022-09738-1","DOIUrl":"10.1007/s11237-022-09738-1","url":null,"abstract":"<div><div><p>CoL<sub>3</sub>·DMF, [CoCdCl<sub>2</sub>L<sub>3</sub>]·0.5H<sub>2</sub>O, and [CoMnCl<sub>2</sub>L<sub>3</sub>]·H<sub>2</sub>O complexes, where HL is a product of the condensation of o-vanillin and methylamine have been obtained. The crystal structure of the latter complex has been determined by X-ray structural analysis. The study of the antioxidant activity of these complexes in a model reaction of radical-chain oxidation of benzyl alcohol with an atmospheric oxygen has proved a significant inhibition of this process at concentrations of the complexes of 10<sup>–7</sup>-10<sup>–6</sup> mol/L. It is established that the inhibitory activity of the compounds depends on the nature of the metal ions present in the complex.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4322413","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}
引用次数: 1
Photocatalytic Reduction of Co2 Under Visible Light with the Participation of Binary Cu2O/Ag2O Nanoheterostructures 二元Cu2O/Ag2O纳米异质结构参与下可见光下Co2的光催化还原
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2022-10-07 DOI: 10.1007/s11237-022-09737-2
M. L. Ovcharov, A. M. Mishura, O. A. Mikhalyova, V. M. Granchak
{"title":"Photocatalytic Reduction of Co2 Under Visible Light with the Participation of Binary Cu2O/Ag2O Nanoheterostructures","authors":"M. L. Ovcharov,&nbsp;A. M. Mishura,&nbsp;O. A. Mikhalyova,&nbsp;V. M. Granchak","doi":"10.1007/s11237-022-09737-2","DOIUrl":"10.1007/s11237-022-09737-2","url":null,"abstract":"<div><div><p>Foam-like binary Cu<sub>2</sub>O/Ag<sub>2</sub>O nanoheterostructures have been obtained by an electrochemical method. Their photoelectrochemical and spectral properties have been studied. The photocatalytic properties of these composites in the process of gas-phase reduction of carbon dioxide with water vapor have been studied. The formation of binary nanoheterostructures leads to an increase in methane yield and an increase in the amount of other organic products (acetaldehyde, ethylene, and ethanol) while the system is irradiated with visible light when compared to Cu<sub>2</sub>O. This effect can be explained by the formation of a nanostructured Cu<sub>2</sub>O/Ag<sub>2</sub>O binary composite with a mutually consistent energy profile.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4322076","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}
引用次数: 0
Influence of Mechanochemical and Sonochemical Methods of Preparation of TiO2/ZrO2 Composites on Photocatalytic Performance in Prometrine Decomposition 机械化学和声化学制备TiO2/ZrO2复合材料对promemine分解光催化性能的影响
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2022-10-07 DOI: 10.1007/s11237-022-09735-4
O. V. Sachuk, V. A. Zazhigalov, O. V. Kiziun, N. L. Hes, A. M. Mylin, L. Yo. Kotynska, L. S. Kuznetsova, S. M. Shcherbakov, V. M. Kordan
{"title":"Influence of Mechanochemical and Sonochemical Methods of Preparation of TiO2/ZrO2 Composites on Photocatalytic Performance in Prometrine Decomposition","authors":"O. V. Sachuk,&nbsp;V. A. Zazhigalov,&nbsp;O. V. Kiziun,&nbsp;N. L. Hes,&nbsp;A. M. Mylin,&nbsp;L. Yo. Kotynska,&nbsp;L. S. Kuznetsova,&nbsp;S. M. Shcherbakov,&nbsp;V. M. Kordan","doi":"10.1007/s11237-022-09735-4","DOIUrl":"10.1007/s11237-022-09735-4","url":null,"abstract":"<div><div><p>Nanosized TiO<sub>2</sub>/ZrO<sub>2</sub>=1:1 composites have been obtained by mechanochemical, ultrasonic, and coprecipitation methods. It is shown that mechanochemical and ultrasonic treatments of a TiO<sub>2</sub> and ZrO<sub>2</sub> mixture lead to size reduction of oxide particles, changes in X-ray diffraction spectra, the formation of a mesoporous structure of TiO<sub>2</sub>/ZrO<sub>2</sub> samples, and an increase in their photocatalytic activity in the reaction of Gesagard (prometryn) herbicide destruction in an aqueous medium when compared to a mechanical TiO<sub>2</sub> and ZrO<sub>2</sub> mixture. It is found that the sample obtained by coprecipitation is X-ray amorphous with a well-developed surface, however, it is significantly inferior to samples obtained by alternative methods in terms of photoactivity.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4322106","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}
引用次数: 0
Polaron States of 3,4-Ethylenedioxythiophene Oligomers 3,4-乙烯二氧噻吩低聚物的极化子态
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2022-08-25 DOI: 10.1007/s11237-022-09727-4
M. I. Terebinska, O. V. Filonenko, O. I. Tkachuk, A. M. Datsyuk, V. V. Lobanov
{"title":"Polaron States of 3,4-Ethylenedioxythiophene Oligomers","authors":"M. I. Terebinska,&nbsp;O. V. Filonenko,&nbsp;O. I. Tkachuk,&nbsp;A. M. Datsyuk,&nbsp;V. V. Lobanov","doi":"10.1007/s11237-022-09727-4","DOIUrl":"10.1007/s11237-022-09727-4","url":null,"abstract":"<div><div><p>The electronic and spatial structure of 3,4-ethylenedioxythiophene oligomer containing 12 units (E12) in 0, +1, +2, +3, and +4 charge states has been calculated by the method of density functional theory (B3LYP 6-31 G**). It is shown that electron conductivity in the oxidized oligomer E12<sup>4+</sup> is provided by two bipolarons at the ends of the chain.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4958615","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}
引用次数: 0
Effect of Acid–Base Characteristics of Zeolite Catalysts on Oxidative Dehydrogenation of Propane with Carbon Dioxide 沸石催化剂酸碱特性对丙烷二氧化碳氧化脱氢反应的影响
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2022-08-25 DOI: 10.1007/s11237-022-09729-2
A. Yu. Kapran, S. M. Orlyk
{"title":"Effect of Acid–Base Characteristics of Zeolite Catalysts on Oxidative Dehydrogenation of Propane with Carbon Dioxide","authors":"A. Yu. Kapran,&nbsp;S. M. Orlyk","doi":"10.1007/s11237-022-09729-2","DOIUrl":"10.1007/s11237-022-09729-2","url":null,"abstract":"<div><div><p>The peculiarities of propane dehydrogenation with carbon dioxide over zeolite catalysts of different structural types, in particular, BEA with incorporated Zn, Ga (Ta, Nb) heteroelements have been analyzed. The role of CO<sub>2</sub> as an oxidant, the effect of acid–base characteristics on propylene selectivity and yield, the stability of catalyst operation, and the routes of activation of reagents on acid–base sites of the surface are considered.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4959302","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}
引用次数: 0
Mono- and Few-Layer Nitrogen-Containing Graphenes as Sensitive Layers of Electrochemical Sensors for Selective Determination of Dopamine and Uric Acid in the Presence of Ascorbic Acid 单层和少层含氮石墨烯作为电化学传感器在抗坏血酸存在下选择性测定多巴胺和尿酸的敏感层
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2022-08-25 DOI: 10.1007/s11237-022-09728-3
O. A. Kozarenko, A. S. Kondratyuk, V. S. Dyadyun, V. L. Karbivskiy, V. G. Koshechko, V. D. Pokhodenko
{"title":"Mono- and Few-Layer Nitrogen-Containing Graphenes as Sensitive Layers of Electrochemical Sensors for Selective Determination of Dopamine and Uric Acid in the Presence of Ascorbic Acid","authors":"O. A. Kozarenko,&nbsp;A. S. Kondratyuk,&nbsp;V. S. Dyadyun,&nbsp;V. L. Karbivskiy,&nbsp;V. G. Koshechko,&nbsp;V. D. Pokhodenko","doi":"10.1007/s11237-022-09728-3","DOIUrl":"10.1007/s11237-022-09728-3","url":null,"abstract":"<div><div><p>A comparative study of electrochemical properties of mono- and few-layer samples of nitrogen-doped graphene as nanosized sensor materials for the qualitative and quantitative determination of dopamine and uric acid has been performed. It is found that the few-layer graphene (NGr(f)) is characterized by high sensibility to dopamine, while monolayer one (NGr(m)) is characterized by high sensibility to uric acid in presence of considerable concentrations of ascorbic acid. XPS results show that the nitrogen content is 8.3 at.% in NGr(f) and 6.2 at.% in NGr(m). The analysis of Raman spectra allows to establish, that NGr(f) and NGr(m) have a defective structure. NGr(f) is characterized mainly by edge defects, while NGr(m) is characterized by vacancies, what obviously predetermines the differences in electrochemical properties of these materials.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4961398","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}
引用次数: 0
Protic Oligosilsesquioxane Dicationic Ionic Liquids with Two Types of Ionic Sites in Organic Frame 有机骨架中两类离子位的质子低聚硅氧烷定向离子液体
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2022-08-25 DOI: 10.1007/s11237-022-09732-7
V. V. Shevchenko, M. A. Gumenna, N. S. Klimenko, O. V. Stryutsky, V. V. Trachevsky, L. L. Kovalenko, V. V. Kravchenko
{"title":"Protic Oligosilsesquioxane Dicationic Ionic Liquids with Two Types of Ionic Sites in Organic Frame","authors":"V. V. Shevchenko,&nbsp;M. A. Gumenna,&nbsp;N. S. Klimenko,&nbsp;O. V. Stryutsky,&nbsp;V. V. Trachevsky,&nbsp;L. L. Kovalenko,&nbsp;V. V. Kravchenko","doi":"10.1007/s11237-022-09732-7","DOIUrl":"10.1007/s11237-022-09732-7","url":null,"abstract":"<div><div><p>A method of synthesis of oligomeric siloxane protic ionic liquids capable of condensation reactions has been developed as starting compounds in the obtaining proton exchange membranes for fuel cells. Their organic frame is characterized by a combination of amine centers of different basicity (aliphatic and imidazole types) neutralized with ethanesulfonic acid and secondary hydroxyl groups. A change in the degree of neutralization of the amine centers significantly affects the structure of the compounds and the mechanism of proton migration. The conductivity of the obtained compounds reaches 9.8·10<sup>–4</sup> S/cm at 100°C in the absence of moisture.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4959303","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}
引用次数: 1
Co-Fe/Al2O3 Nanocomposite Catalysts of the Process of CO2 Hydrogenation Co-Fe/Al2O3纳米复合催化剂在CO2加氢过程中的应用
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2022-08-25 DOI: 10.1007/s11237-022-09731-8
A. G. Dyachenko, O. V. Ischenko, M. V. Borysenko, S. V. Gaidai, A. V. Yatsymyrskyi, G. G. Tsapyuk, O. V. Pryhunova, O. O. Kostyrko
{"title":"Co-Fe/Al2O3 Nanocomposite Catalysts of the Process of CO2 Hydrogenation","authors":"A. G. Dyachenko,&nbsp;O. V. Ischenko,&nbsp;M. V. Borysenko,&nbsp;S. V. Gaidai,&nbsp;A. V. Yatsymyrskyi,&nbsp;G. G. Tsapyuk,&nbsp;O. V. Pryhunova,&nbsp;O. O. Kostyrko","doi":"10.1007/s11237-022-09731-8","DOIUrl":"10.1007/s11237-022-09731-8","url":null,"abstract":"<div><div><p>Effective catalysts of CO<sub>2</sub> hydrogenation towards methane were obtained by impregnation of aluminum oxide with cobalt and iron nitrates. The catalysts have been characterized by XRD, SEM-EDX, argon physisorption, and TPD with mass-spectroscopy analysis. It is shown that an increase in the amount of applied Co-Fe active mass in the composition of a nanocomposite catalyst leads to an increase in the CO<sub>2</sub> conversion and CH<sub>4</sub> yield.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4958608","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}
引用次数: 1
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信