Russian Journal of Physical Chemistry A最新文献_第2页

Kinetics of Molecular Chlorine Release during Photochemical Ozonation of Acidic Chloride Solutions 酸性氯溶液光化学臭氧化过程中氯分子释放动力学研究

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-03-23 DOI: 10.1134/S0036024425703455

A. V. Levanov, A. O. Orujov, O. Ya. Isaikina

{"title":"Kinetics of Molecular Chlorine Release during Photochemical Ozonation of Acidic Chloride Solutions","authors":"A. V. Levanov, A. O. Orujov, O. Ya. Isaikina","doi":"10.1134/S0036024425703455","DOIUrl":"10.1134/S0036024425703455","url":null,"abstract":"The kinetics of the release of molecular chlorine during the oxidation of the chloride ion in acidified aqueous solutions (pH ≤2) under the action of ozone and UV radiation with a wavelength of 254 nm has been studied. In contrast to the dark reaction of O3 with Cl–(aq), the photochemical reaction gives significant yields of Cl2 relative to the starting O3, reaching 70% in weakly acidic solutions at pH 2. At increased acidity (pH ≤0.1), the Cl2 yields during the photochemical and dark ozonation are closer. The combined action of ozone and UV irradiation on the oxidation of Cl–(aq) is achieved due to the generation of free hydroxyl OH radicals and hydrogen peroxide H2O2 during the photolysis of O3 in an aqueous medium. Due to the interaction with OH radicals, the oxidation of chloride ions is accelerated, and in the “O3–Cl–(aq)–hν (254 nm)” system there is an additional source of active free radicals capable of participating in the oxidation of Cl–(aq), the nature of which cannot be explained based on the known mechanisms of chemical processes in similar systems. Hydrogen peroxide inhibits the oxidation of Cl–(aq), since it effectively interacts with Cl2 and other chlorine compounds in the nonnegative oxidation states and reduces them to the chloride ion.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 2","pages":"230 - 237"},"PeriodicalIF":0.8,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147560707","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

Comparison of the Adsorption Properties of the Mesoporous Sorbents Modified with Chelate Complexes of Rare-Earth Benzoyl Acetonates Studied by Gas Chromatography 气相色谱法研究稀土苯甲酰乙酯螯合物修饰介孔吸附剂的吸附性能

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-03-23 DOI: 10.1134/S0036024425703510

Zh. V. Faustova, Yu. G. Slizhov, V. V. Kamotskii

{"title":"Comparison of the Adsorption Properties of the Mesoporous Sorbents Modified with Chelate Complexes of Rare-Earth Benzoyl Acetonates Studied by Gas Chromatography","authors":"Zh. V. Faustova, Yu. G. Slizhov, V. V. Kamotskii","doi":"10.1134/S0036024425703510","DOIUrl":"10.1134/S0036024425703510","url":null,"abstract":"New sorption materials have been synthesized from mesoporous silicon dioxide modified with cerium, europium, and ytterbium benzoyl acetonates. The temperature at which the resulting sorbents are stable (260–320°C) was determined by thermal analysis. It was shown by low-temperature nitrogen adsorption/desorption that modification of the surface of the mesoporous SiO2 layer leads to a decrease in the specific surface area from 133 to 100 m2 g–1. A gas chromatographic analysis revealed that the polarity of the samples with deposited cerium, europium, and ytterbium benzoyl acetonate complexes increases, the highest values being characteristic of organic compounds prone to donor-acceptor and proton-acceptor interactions. The effects of cerium, europium, and ytterbium benzoyl acetonates on the thermodynamic characteristics of adsorption of various classes of organic substances on the mesoporous SiO2 surface were studied by gas chromatography. The differential molar heats of adsorption ({{bar {q}}_{{{text{dif,1}}}}}), the change in the standard differential molar entropy of adsorption (Delta bar {S}_{{1,{text{C}}}}^{0}), and the contributions of specific interactions to the total adsorption energy Δ({{bar {q}}_{{{text{dif}},1({text{sp}})}}}) were calculated from the experimental data on the retention of the test adsorbate molecules.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 2","pages":"281 - 288"},"PeriodicalIF":0.8,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147561228","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

Structure and Properties of the Lithium Bis(fluorosulfonyl)imide (LiFSI) in Sulfolane. Molecular Dynamics Simulation 双（氟磺酰基）亚胺锂（LiFSI）的结构与性能。分子动力学模拟

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-03-23 DOI: 10.1134/S0036024425703509

A. R. Yusupova, E. V. Kuz’mina, V. S. Kolosnitsyn

{"title":"Structure and Properties of the Lithium Bis(fluorosulfonyl)imide (LiFSI) in Sulfolane. Molecular Dynamics Simulation","authors":"A. R. Yusupova, E. V. Kuz’mina, V. S. Kolosnitsyn","doi":"10.1134/S0036024425703509","DOIUrl":"10.1134/S0036024425703509","url":null,"abstract":"The structure and transport properties of lithium bis(fluorosulfonyl)imide (LiFSI) solutions in sulfolane are studied using molecular dynamics simulation in the concentration range of 0.04 to 5.2 M. It is established that the composition of the first coordination sphere of Li+ cation depends significantly on the salt concentration: in diluted solutions (<1 M), the lithium cation is solvated by sulfolane molecules; at high concentrations (>1 M), the composition of the solvate shell contains the solvent molecules and the anion–ion associates and polynuclear complexes form. Li+ and FSI– diffusion coefficients decrease sharply when passing from diluted (0.1 M) to concentrated (2 M) solutions because of the increase in interactions between ions. The maximum ionic conductivity (~3.13 mS/cm) is reached at ~0.94 M. In high-concentration solutions (3–5.2 M), the specific ionic conductivity decreases because of the formation of a rigid ion matrix in spite of the increase in the Li+ transport number. The results of our study show that electrolytes based on lithium bis(fluorosulfonyl)imide in sulfolane are characterized by a high ionic conductivity, which confirms that they are perspective if they are used as electrolytes for lithium current sources.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 2","pages":"269 - 280"},"PeriodicalIF":0.8,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147561227","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

Effects of the Textural Characteristics of the Copper–Zinc–Aluminum Catalyst on Its Catalytic Properties in the Carbon Monoxide Conversion with Water Vapor 铜-锌-铝催化剂的结构特性对水蒸气催化一氧化碳转化性能的影响

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-03-23 DOI: 10.1134/S0036024425703364

R. N. Rumyantsev, N. A. Ovchinnikov, G. O. Dolotov, T. E. Stroganova, N. E. Gordina

{"title":"Effects of the Textural Characteristics of the Copper–Zinc–Aluminum Catalyst on Its Catalytic Properties in the Carbon Monoxide Conversion with Water Vapor","authors":"R. N. Rumyantsev, N. A. Ovchinnikov, G. O. Dolotov, T. E. Stroganova, N. E. Gordina","doi":"10.1134/S0036024425703364","DOIUrl":"10.1134/S0036024425703364","url":null,"abstract":"A comparative study of the textural and catalytic properties of copper–zinc–aluminum catalysts synthesized by the carbonate and oxalate technologies is presented. The samples were characterized by physicochemical methods, including X-ray diffraction analysis, scanning electron microscopy, low-temperature nitrogen adsorption, and temperature-programmed reduction. The carbonate method led to the formation of a less developed porous structure with a specific surface area of 52 m2/g, pore volume of 0.067 cm3/g, and degree of copper dispersion of 3.84%, while the oxalate method gave a catalyst with significantly better textural characteristics: specific surface area of 140 m2/g, pore volume of 0.142 cm3/g, and degree of copper dispersion of 15%. Despite significant differences in their physicochemical properties, the catalytic activity of the catalysts differs only slightly; but the rate of methanol formation on the catalysts obtained using the carbonate technology is four times higher. The superior textural characteristics do not guarantee higher catalytic activity over the entire temperature range, and the low specific and active surface areas, as well as degree of dispersion, can reduce the service life of the catalyst. The results emphasize the importance of choosing the synthesis method to optimize the structural and functional properties of the catalysts; the influence of these properties on their activity and selectivity is demonstrated.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 2","pages":"180 - 186"},"PeriodicalIF":0.8,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147560708","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

Energy Aspects of the Thermal Behavior of Low-Sodium Zeolite ZSM-5 低钠沸石ZSM-5热行为的能量方面

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-03-23 DOI: 10.1134/S0036024425703376

E. S. Severgina, T. A. Kamanova, D. A. Kravchuk, R. N. Rumyantsev, O. P. Smirnova, N. E. Gordina

引用次数: 0

Investigation of Complex Formation Processes in the Fe(II) with 1-Methyl-2-mercaptoimidazole System by Oxidation–Reduction Method at T = 318 K and Different Ionic Strengths 在T = 318 K和不同离子强度条件下，氧化还原法研究Fe（II）与1-甲基-2-巯基咪唑体系的络合物形成过程

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-03-23 DOI: 10.1134/S0036024425703479

S. G. Yormamadova, I. U. Kamolzoda, U. Rajabov, O. I. Shomirzoeva, G. B. Bobonazarzoda

{"title":"Investigation of Complex Formation Processes in the Fe(II) with 1-Methyl-2-mercaptoimidazole System by Oxidation–Reduction Method at T = 318 K and Different Ionic Strengths","authors":"S. G. Yormamadova, I. U. Kamolzoda, U. Rajabov, O. I. Shomirzoeva, G. B. Bobonazarzoda","doi":"10.1134/S0036024425703479","DOIUrl":"10.1134/S0036024425703479","url":null,"abstract":"The complexation behavior of the Fe(II)–1-methyl-2-mercaptoimidazole system was investigated through oxidation potential measurements across a range of ionic strengths and temperatures. Based on these investigations, both chemical and mathematical models were developed to describe the ionic equilibria involved in the complex formation. The analysis identified the formation of four distinct Fe(II) complex species: [FеHmerc(H2О)5]2+; [Fеmerc(H2О)4]+; [FеНmerc(H2О)3ОH]0; and [Fе(merc)2(H2О)2]0 at 318 K and an ionic strength of 0.5 mol/L (Na2SO4). The formation constants of these complexes were determined through oxidation function analysis. Furthermore, the chemical composition of the complexes was characterized over a range of pH values, and optimal conditions for achieving the maximum yield of Fe(II)–1-methyl-2-mercaptoimidazole complexes were established.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 2","pages":"246 - 250"},"PeriodicalIF":0.8,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147560816","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

Studying the Complexation of Mercury(II) with 1-Phenyl-2,3-dimethylpyrazoline-5-thione in 1.0 mol/L HNO3 汞（II）与1-苯基-2,3-二甲基吡唑啉-5-硫酮在1.0 mol/L HNO3中的络合作用研究

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-03-23 DOI: 10.1134/S0036024425703339

N. S. Beknazarova, J. O. Shoalifov

{"title":"Studying the Complexation of Mercury(II) with 1-Phenyl-2,3-dimethylpyrazoline-5-thione in 1.0 mol/L HNO3","authors":"N. S. Beknazarova, J. O. Shoalifov","doi":"10.1134/S0036024425703339","DOIUrl":"10.1134/S0036024425703339","url":null,"abstract":"The complexation of mercury(II) contained in Hg(NO3)2⋅2H2O with 1-phenyl-2,3-dimethylpyrazoline-5-thione (PDPT) in 1.0 mol/L HNO3 at 273–338 K is studied by potentiometric titration using a redox electrode based on PDPT and the oxidized form of it. It is found that four complex species are formed in the studied system; they have the following compositions: [HgL(H2O)3]2+, [HgL2(H2O)2]2+, [HgL3(H2O)]2+, and [HgL4]2+. For each complex species, stability constants are found and refined using the Bjerrum method. It is shown that the stepwise stability constants of mercury(II)–PDPT complexes decrease with an increase in temperature and the number of coordinated ligand molecules in the inner sphere of the complex. Using the stability constants, the thermodynamic functions of the complexation process are calculated. Distribution curves for all complex species formed in the Hg(II)–PDPT–1.0 mol/L HNO3 system at temperatures of 273–338 K are calculated. The distribution diagrams of mercury(II)–PDPT complexes as a function of organic ligand concentration are analyzed to identify the region of dominance of all complex species formed in the studied system and develop optimum procedures for synthesizing novel mercury(II) coordination compounds.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 2","pages":"159 - 164"},"PeriodicalIF":0.8,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147561229","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

Complexation of Thia-Crown Ethers with Nickel(II) and Silver(I) Ions in Ethanol and Dimethyl Sulfoxide 硫冠醚与镍（II）和银(I)离子在乙醇和二甲亚砜中的络合作用

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-03-23 DOI: 10.1134/S0036024425703406

T. R. Usacheva, N. N. Kuranova, O. N. Krutova, O. V. Kryukova, E. S. Rabbanieva, A. M. Khabibrakhmanova, A. R. Kurbangalieva, Liping Ding

引用次数: 0

Thermochemistry of Dissolution of 5,10,15,20-Tetrakis(1'-methylpyrid-4-yl)porphyrin Tetratosylate at 298.15 K 298.15 K下5,10,15,20-四酰基（1′-甲基吡啶-4-基）卟啉四酰基酸盐溶解的热化学性质

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-03-23 DOI: 10.1134/S0036024425703431

O. N. Krutova, N. M. Berezina, P. D. Krutov, M. I. Bazanov, A. V. Volkov, V. V. Chernikov, E. E. Kiptikova, E. A. Kasatkin

引用次数: 0

Synthesis of Bulk Catalysts for Liquid-Phase Hydrogenation Using Metal Ammonia Carbonate Salts 金属碳酸氨盐液相加氢本体催化剂的合成

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-03-23 DOI: 10.1134/S0036024425703388

E. P. Smirnov, E. A. Pokrovskaya, D. A. Prozorov, A. V. Afineevskii, D. S. Shakhov

引用次数: 0