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Obtaining of Silver Nanoparticles in the Presence of Quercetin and Rutin Flavonoids 槲皮素和芦丁黄酮存在下纳米银的制备
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2023-07-29 DOI: 10.1007/s11237-023-09774-5
I. S. Petrik, A. M. Eremenko, A. I. Marynin, V. M. Pasichnyi
{"title":"Obtaining of Silver Nanoparticles in the Presence of Quercetin and Rutin Flavonoids","authors":"I. S. Petrik,&nbsp;A. M. Eremenko,&nbsp;A. I. Marynin,&nbsp;V. M. Pasichnyi","doi":"10.1007/s11237-023-09774-5","DOIUrl":"10.1007/s11237-023-09774-5","url":null,"abstract":"<div><div><p>The peculiarities of the formation and stabilization of silver nanoparticles (NP) in the presence of quercetin and rutin during chemical (NaBH<sub>4</sub>), thermal (at 90°C) and photochemical reduction of Ag<sup>+</sup> ions have been studied considering the ratios of the components. It is shown that the reduction of Ag<sup>+</sup> with the formation of silver nanoparticles with size of 50-90 nm occurs most efficiently in the presence of quercetin under the action of UV irradiation. The stabilization of Ag NP occurs due to complexation of flavonoid molecules with the silver ions on the surface of nanoparticles. The obtianed binary colloid composites flavonoid–Ag may be used in medicine as anti-inflammatory and bactericidal agents of prolonged action.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"59 2","pages":"143 - 149"},"PeriodicalIF":1.0,"publicationDate":"2023-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5118546","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 Cerium and Stibium Additives on Sensitivity of Semiconductor Sensors Based on Nanosized SnO2 to Hydrogen 铈和锑添加剂对纳米SnO2半导体传感器对氢灵敏度的影响
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2023-07-29 DOI: 10.1007/s11237-023-09773-6
L. P. Oleksenko, G. V. Fedorenko, N. P. Maksymovych
{"title":"Influence of Cerium and Stibium Additives on Sensitivity of Semiconductor Sensors Based on Nanosized SnO2 to Hydrogen","authors":"L. P. Oleksenko,&nbsp;G. V. Fedorenko,&nbsp;N. P. Maksymovych","doi":"10.1007/s11237-023-09773-6","DOIUrl":"10.1007/s11237-023-09773-6","url":null,"abstract":"<div><div><p>Semiconductor materials based on SnO<sub>2</sub> with different contents of cerium and stibium have been obtained. Their phase compositions, particle sizes and sensitivities of semiconductor sensors based on them to hydrogen have been studied. It is found that introduction of cerium into the material contributes to reduce the sizes of SnO<sub>2</sub> nanoparticles. Changes in the values of the sensor responses to hydrogen are explained by influence of catalytic activity of cerium and the competing effect of the introduced stibium on conductivities of the materials.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"59 2","pages":"136 - 142"},"PeriodicalIF":1.0,"publicationDate":"2023-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5118547","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
Luminescence Properties of K2Bi(PO4)(MoO4):Gd,Eu Solid Solutions K2Bi(PO4)(MoO4):Gd,Eu固溶体的发光特性
IF 1 4区 化学
Theoretical and Experimental Chemistry Pub Date : 2023-07-28 DOI: 10.1007/s11237-023-09769-2
V. O. Zozulia, K. V. Terebilenko, S. G. Nedilko, V. P. Chornii, M. S. Slobodyanik
{"title":"Luminescence Properties of K2Bi(PO4)(MoO4):Gd,Eu Solid Solutions","authors":"V. O. Zozulia,&nbsp;K. V. Terebilenko,&nbsp;S. G. Nedilko,&nbsp;V. P. Chornii,&nbsp;M. S. Slobodyanik","doi":"10.1007/s11237-023-09769-2","DOIUrl":"10.1007/s11237-023-09769-2","url":null,"abstract":"<div><div><p>Solid solutions K<sub>2</sub>Bi(PO<sub>4</sub>)(MoO<sub>4</sub>):Gd,Eu containing from 0.1 to 30 mole% of europium(III) and 0.1 mole% of gadolinium(III) have been prepared by conventional solid state reaction. The samples are characterized by X-ray powder diffraction method, IR and luminescence spectroscopies. It has been shown that doping with Eu<sup>3+</sup> does not affect the symmetry of the layered framework. At room temperature, all the studied samples are characterized by intense red photoluminescence, which is associated with <sup>5</sup><i>D</i><sub>0</sub>→<sup>7</sup><i>F</i><sub>0-4</sub> emission transitions in Eu<sup>3+</sup> ions. Due to the absence of concentration quenching and color characteristics, K<sub>2</sub>Bi(PO<sub>4</sub>)(MoO<sub>4</sub>):Gd,Eu has prominent prospects for application as a red phosphor.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"59 2","pages":"107 - 111"},"PeriodicalIF":1.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5085141","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 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
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