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Photocatalytic Hydrogen Evolution from Solutions of Benzyl Alcohols Under the Action of Visible Light with the Participation of Crystalline Graphite-Like Carbon Nitride 晶体类石墨氮化碳参与下可见光作用下苯甲醇溶液的光催化析氢
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2023-05-20 DOI: 10.1007/s11237-023-09762-9
V. V. Shvalagin, G. V. Korzhak, S. Ya. Kuchmiy
{"title":"Photocatalytic Hydrogen Evolution from Solutions of Benzyl Alcohols Under the Action of Visible Light with the Participation of Crystalline Graphite-Like Carbon Nitride","authors":"V. V. Shvalagin,&nbsp;G. V. Korzhak,&nbsp;S. Ya. Kuchmiy","doi":"10.1007/s11237-023-09762-9","DOIUrl":"10.1007/s11237-023-09762-9","url":null,"abstract":"<div><div><p>It is established that the effeciency of the hydrogen evolution from water–acetonitrile solutions of benzyl alcohol and a number of its derivatives under the action of visible light with the participation of crystalline graphite-like carbon nitride increases when electron-donating ability of the substituent in the para position of benzyl alcohol increases. The highest H<sub>2</sub> evolution rate, 720 μmol·h<sup>–1</sup>·g<sup>–1</sup> (quantum yield Φ = 22% at 405 nm), is achieved in solutions of 4-methoxybenzyl alcohol in the presence of 0.1 M HCl at 40 °C.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"59 1","pages":"32 - 37"},"PeriodicalIF":1.0,"publicationDate":"2023-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4804852","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
Photocatalytic Properties of Zinc Oxide Prepared by Combustion of Jellied Precursor 凝胶前驱体燃烧制备氧化锌的光催化性能
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2023-05-20 DOI: 10.1007/s11237-023-09761-w
V. O. Zazhigalov, D. V. Brazhnyk, O. V. Sachuk, O. V. Kiziun, I. V. Bacherikova, I. Alessandri, L. E. Depero
{"title":"Photocatalytic Properties of Zinc Oxide Prepared by Combustion of Jellied Precursor","authors":"V. O. Zazhigalov,&nbsp;D. V. Brazhnyk,&nbsp;O. V. Sachuk,&nbsp;O. V. Kiziun,&nbsp;I. V. Bacherikova,&nbsp;I. Alessandri,&nbsp;L. E. Depero","doi":"10.1007/s11237-023-09761-w","DOIUrl":"10.1007/s11237-023-09761-w","url":null,"abstract":"<div><div><p>It is shown that zinc oxide synthesized by combustion of jellied precursor forms well-crystallized micro-sized particles when treated at 600 °C. It is shown that these particles reveal high photocatalytic activity in rhodamine B dye and metronidazole degradation processes in an aqueous medium, exceeding the activity of commercial nano-sized samples of ZnO. The activity increase of the synthesized sample is connected with the presence of oxygen vacancies, which provides to formation of the charged oxygen species and OH groups on the oxide surface. The formation of zinc oxide microcrystals contributes to the separation of photogenerated charges and reduces the probability of their recombination.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"59 1","pages":"25 - 31"},"PeriodicalIF":1.0,"publicationDate":"2023-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4799212","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
Main Trends in the Development of Microwave Dielectric Materials for Cellular Communication Devices: A Review 蜂窝通信器件用微波介质材料发展的主要趋势
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2023-05-20 DOI: 10.1007/s11237-023-09759-4
A. G. Belous, O. I. V’yunov
{"title":"Main Trends in the Development of Microwave Dielectric Materials for Cellular Communication Devices: A Review","authors":"A. G. Belous,&nbsp;O. I. V’yunov","doi":"10.1007/s11237-023-09759-4","DOIUrl":"10.1007/s11237-023-09759-4","url":null,"abstract":"<div><div><p>The requirements for high-quality microwave (MW) dielectrics, which are used in the development of cellular communication devices (radio filters, solid-state generators, etc.) for the transition from 3G to 5G communication, are considered. The results of studies on important classes of MW dielectrics based on complex oxide systems of different crystal structures, such as potassium tungsten bronze, perovskite, pucherite, dreyerite, scheelite, as well as high-quality MW dielectrics with different permittivities, are systematized.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"59 1","pages":"1 - 16"},"PeriodicalIF":1.0,"publicationDate":"2023-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4800063","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 Chemical Structure of Fluorinated Surfactants on the Air/Water Interface Properties 含氟表面活性剂的化学结构对空气/水界面性能的影响
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2023-05-19 DOI: 10.1007/s11237-023-09767-4
Yuan Xu, Xianwu Jing, Lang Zhou, Yongfan Tang, Yongjun Xiao
{"title":"Influence of Chemical Structure of Fluorinated Surfactants on the Air/Water Interface Properties","authors":"Yuan Xu,&nbsp;Xianwu Jing,&nbsp;Lang Zhou,&nbsp;Yongfan Tang,&nbsp;Yongjun Xiao","doi":"10.1007/s11237-023-09767-4","DOIUrl":"10.1007/s11237-023-09767-4","url":null,"abstract":"<div><div><p>The formation heats for a number of gemini fluorocarbon surfactants have been estimated using density functional theory (DFT), the values of air/water interface formation energies (IFE) have been compared. It is shown that the fluorocarbon surfactants can efficiently reduce the surface tension of the air/water interface. One of the representatives of the surfactants, possessing the highest IFE value (in absolute value), has been prepared and its critical micelle concentration and the corresponding surface tension have been experimentally determined.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"59 1","pages":"66 - 74"},"PeriodicalIF":1.0,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4763179","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 Structure on Lifetime of the Excited State of New Heptamethinecyanines Based on Benzo[cd]Indole 结构对苯并吲哚类新型七甲基青碱激发态寿命的影响
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2023-05-19 DOI: 10.1007/s11237-023-09760-x
A. A. Ishchenko, I. V. Kurdyukova, Yu. L. Slominskii, I. P. Sharanov
{"title":"Influence of Structure on Lifetime of the Excited State of New Heptamethinecyanines Based on Benzo[cd]Indole","authors":"A. A. Ishchenko,&nbsp;I. V. Kurdyukova,&nbsp;Yu. L. Slominskii,&nbsp;I. P. Sharanov","doi":"10.1007/s11237-023-09760-x","DOIUrl":"10.1007/s11237-023-09760-x","url":null,"abstract":"<div><div><p>It is shown that new benzo[cd]indole-based heptamethinecyanines (HMCs) have an ultrashort lifetime τ of the photoexcited state and a high intensity of light absorption in the generation range of practically important neodymium lasers. The electronic structure and types of electronic transitions in HMCs are analyzed by the DFT and TD-DFT methods. The influence of vibronic and intermolecular interactions on τ is considered. The advantages of HMCs for passive mode locking of lasers over known dyes with ultrashort τ are demonstrated. The advantages of HMCs to implement passive mode locking of lasers over known dyes with ultrashort τ are demonstrated.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"59 1","pages":"17 - 24"},"PeriodicalIF":1.0,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4759526","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 Sn and Zr Content in ZrAl- and SnAl-BEA Hierarchical Zeolites on Their Acidic and Catalytic Properties in the Process of Cyclohexanone Oxidation with Hydrogen Peroxide ZrAl-和SnAl-BEA级沸石中Sn和Zr含量对过氧化氢氧化环己酮酸性和催化性能的影响
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2023-05-19 DOI: 10.1007/s11237-023-09765-6
M. M. Kurmach, A. O. Samotoi, S. O. Sotnik, P. S. Yaremov, O. V. Shvets, N. D. Scherban
{"title":"Effect of Sn and Zr Content in ZrAl- and SnAl-BEA Hierarchical Zeolites on Their Acidic and Catalytic Properties in the Process of Cyclohexanone Oxidation with Hydrogen Peroxide","authors":"M. M. Kurmach,&nbsp;A. O. Samotoi,&nbsp;S. O. Sotnik,&nbsp;P. S. Yaremov,&nbsp;O. V. Shvets,&nbsp;N. D. Scherban","doi":"10.1007/s11237-023-09765-6","DOIUrl":"10.1007/s11237-023-09765-6","url":null,"abstract":"<div><div><p>Series of ZrAl- and SnAl-silicate hierarchical zeolites of the BEA structural type have been synthesized by hydrothermall method, and their acidic and catalytic properties in the reaction of cyclohexanone oxidation with hydrogen peroxide have been investigated. For SnAl-BEA zeolites, the conversion of cyclohexanone into ε-caprolactone increases as the tin content in the samples increases in the range of 0.83-2.5 mole%Sn and the concentration of Lewis acid sites increases, while for ZrAl-BEA zeolites, the maximum value of conversion (80%) is achieved for the sample with 1.33 mole % Zr.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"59 1","pages":"51 - 58"},"PeriodicalIF":1.0,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5061839","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 Modifying Additives of Molybdenum and Tungsten Compounds on the Catalytic Properties of MgO-Al2O3 in the Process of Gas-Phase Conversion of Ethanol Into 1-Butanol 钼钨化合物改性添加剂对MgO-Al2O3气相转化乙醇制1-丁醇催化性能的影响
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2023-05-19 DOI: 10.1007/s11237-023-09764-7
K. V. Valihura, O. V. Larina, S. O. Soloviev
{"title":"Effect of Modifying Additives of Molybdenum and Tungsten Compounds on the Catalytic Properties of MgO-Al2O3 in the Process of Gas-Phase Conversion of Ethanol Into 1-Butanol","authors":"K. V. Valihura,&nbsp;O. V. Larina,&nbsp;S. O. Soloviev","doi":"10.1007/s11237-023-09764-7","DOIUrl":"10.1007/s11237-023-09764-7","url":null,"abstract":"<div><div><p>The regulation of redox and acid–base properties of MgO-Al<sub>2</sub>O<sub>3</sub> systems has been carried out during the synthesis by introducing bifunctional additives of molybdate and tungstate ions. Doping with Mo and W compounds leads to an increase in the activity of Mg-Al-oxide catalysts and the selectivity of 1-butanol formation in the ethanol condensation process due to an increase in the concentration of the sites of ethanol dehydrogenation and acetaldehyde aldol condensation.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"59 1","pages":"42 - 50"},"PeriodicalIF":1.0,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4763178","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
Catalytic Benzoylation of Alanine in Two-Phase Water–Dichloromethane System 两相水-二氯甲烷体系中丙氨酸的催化苯甲酰化反应
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2023-05-19 DOI: 10.1007/s11237-023-09763-8
V. M. Anishchenko, A. M. Redko, O. M. Dykun, V. I. Rybachenko
{"title":"Catalytic Benzoylation of Alanine in Two-Phase Water–Dichloromethane System","authors":"V. M. Anishchenko,&nbsp;A. M. Redko,&nbsp;O. M. Dykun,&nbsp;V. I. Rybachenko","doi":"10.1007/s11237-023-09763-8","DOIUrl":"10.1007/s11237-023-09763-8","url":null,"abstract":"<div><div><p>The inverse phase transfer process of catalytic benzoylation of α-amino acids (on the example of alanine) in a two-phase water–dichloromethane system in the presence of pyridine derivatives as catalysts is investigated. The effect of the initial concentration of alanine, its form in solution, and the initial catalyst concentration on the reaction rate and the composition of the products is studied. It is established that using 4-methyl- and 4-methoxy pyridine N-oxides combined with a double excess of the sodium salt of alanine makes it possible to obtain 2-benzamidopropionic acid with a yield of more than 80%.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"59 1","pages":"38 - 41"},"PeriodicalIF":1.0,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4763177","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
Selectivity of Tryptophan and Phenylalanine Adsorption by Activated Coconut Carbon of Medical Assignment 医用活性炭吸附色氨酸和苯丙氨酸的选择性研究
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2023-05-19 DOI: 10.1007/s11237-023-09766-5
I. A. Farbun, V. A. Trykhlib
{"title":"Selectivity of Tryptophan and Phenylalanine Adsorption by Activated Coconut Carbon of Medical Assignment","authors":"I. A. Farbun,&nbsp;V. A. Trykhlib","doi":"10.1007/s11237-023-09766-5","DOIUrl":"10.1007/s11237-023-09766-5","url":null,"abstract":"<div><div><p>The adsorption capacity of carbon adsorbent KARBON™ for tryptophan and phenylalanine from the individual solutions, their mixtures, and in the presence of leucine, isoleucine, and valine has been studied. It is established that, at the adsorption from the mixture of these amino acids, the overall removal of tryptophan and phenylalanine is an order of magnitude exceeding the removal of aliphatic analogues. Maximum removals (&gt;90%) of tryptophan and phenylalanine are achieved at concentrations of 2.0-2.8 mmol/L, as the concentrations increase to 20-24 mmol/L, the efficiency of the removal of these amino acids is decreased approximately twice. The obtained data show that the enterofraction of the adsorbent KARBON™ can be used as an alternative to amino acid therapy for various diseases.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"59 1","pages":"59 - 65"},"PeriodicalIF":1.0,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4762822","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
Spectral and Luminescence Properties of Mixed-Ligand Eu3+ and Tb3+ Complexes with tris(3-[2′-pyridyl]-pyrazolyl)borate and Carboxylates Containing an N-Salicylideneimine Fragment 三(3-[2 ' -吡啶基]-吡唑基)硼酸盐和含有n -水杨基亚胺片段的羧酸盐混合配体Eu3+和Tb3+配合物的光谱和发光性质
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2023-04-04 DOI: 10.1007/s11237-023-09756-7
E. A. Mikhalyova, K. V. Borysova, E. A. Goreshnik, A. W. Addison
{"title":"Spectral and Luminescence Properties of Mixed-Ligand Eu3+ and Tb3+ Complexes with tris(3-[2′-pyridyl]-pyrazolyl)borate and Carboxylates Containing an N-Salicylideneimine Fragment","authors":"E. A. Mikhalyova,&nbsp;K. V. Borysova,&nbsp;E. A. Goreshnik,&nbsp;A. W. Addison","doi":"10.1007/s11237-023-09756-7","DOIUrl":"10.1007/s11237-023-09756-7","url":null,"abstract":"<div><div><p>It has been shown by single crystal X-ray diffraction analysis that the salicylideneimine fragment of Tp<sup>Py</sup>Ln(sch)<sub>2</sub>(H<sub>2</sub>O) (Ln = Eu, Tb; Tp<sup>Py–</sup> = tris(3-[2′-pyridyl]pyrazolyl)borate; schH = p-schH, m-schH are carboxylate Schiff bases prepared by the reaction of 4- and 3-aminobenzoic acids, respectively, with salicylaldehyde) is not coordinated to the metal ion. The obtained Tb<sup>3+</sup> complexes exhibit ligand-centered emission, while in the luminescence spectra of Eu<sup>3+</sup> compounds narrow bands of characteristic emission of Eu<sup>3+</sup> are also observed. It is found that when the complexes are irradiated with UV light, the transformations of carboxylate ligands in the coordination compounds occur.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"58 6","pages":"409 - 416"},"PeriodicalIF":1.0,"publicationDate":"2023-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4148084","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
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