Russian Journal of General Chemistry最新文献_第6页

Polarizability Effect and Enthalpy of Vaporization of Organic and Organoelement Compounds 有机和有机元素化合物的极化效应和汽化焓

IF 1 4区化学

Russian Journal of General Chemistry Pub Date : 2026-09-05 DOI: 10.1134/S1070363226160061

N. M. Khamaletdinova, O. V. Kuznetsova, A. N. Egorochkin

{"title":"Polarizability Effect and Enthalpy of Vaporization of Organic and Organoelement Compounds","authors":"N. M. Khamaletdinova, O. V. Kuznetsova, A. N. Egorochkin","doi":"10.1134/S1070363226160061","DOIUrl":"10.1134/S1070363226160061","url":null,"abstract":"The effects of substituents on the enthalpies of vaporization ΔHvap, determined experimentally or calculated using quantum chemical methods, were analyzed for 21 series of organic and organoelement compounds. Correlation analysis was applied to narrow reaction (indicator) series XBRC, in which the reaction center RC and bridge B remain constant, whereas the electron-donating and electron-accepting properties of substituents X vary. For the first time, the polarizability effect of substituents was found to operate in all the narrow series considered. The polarizability effect is an ion–dipole interaction between the charge q at the reaction center RC and the dipole moment induced by this charge in substituents X. A necessary condition for this effect is therefore the formation of a partial charge q at the reaction center RC. Isolated compounds have no excess charge, and its appearance results solely from the participation of molecules of the series under study in the formation of weak intermolecular complexes. In some cases, the polarizability effect makes a large, sometimes dominant, contribution to the enthalpy of vaporization, outweighing the contributions of the inductive and resonance effects. The steric effect also influences the enthalpy of vaporization in some series. Therefore, a correct interpretation of the substituent effect on the enthalpy of vaporization ΔHvap, that is, on the conversion of a liquid into a gas, requires consideration of the formation of weak complexes by compounds of the series under study. This complex formation gives rise to the polarizability effect on ΔHvap along with the classical inductive, resonance, and steric effects of substituents.","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"96 9","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148926835","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

Advances in Titanium Dioxide-Based Photocatalysis for the Degradation of Volatile Organic Compounds (A Review) 二氧化钛基光催化降解挥发性有机物的研究进展

IF 1 4区化学

Russian Journal of General Chemistry Pub Date : 2026-09-05 DOI: 10.1134/S1070363226601171

F. Li, X. Zhang, Y. Guo, Z. Ni

{"title":"Advances in Titanium Dioxide-Based Photocatalysis for the Degradation of Volatile Organic Compounds (A Review)","authors":"F. Li, X. Zhang, Y. Guo, Z. Ni","doi":"10.1134/S1070363226601171","DOIUrl":"10.1134/S1070363226601171","url":null,"abstract":"Volatile organic compounds (VOCs) serve as primary precursors of atmospheric secondary pollution and present substantial risks to the ecological environment and human health. TiO2-based photocatalysis represents a promising approach for VOCs degradation, attributed to its robust oxidation capacity, excellent stability, low cost, and environmentally benign final products (CO2 and H2O). Nevertheless, the wide bandgap, rapid charge recombination, and poor visible-light response of pure TiO2 restrict its practical implementation. This review compiles the recent advancements in modified TiO2 photocatalysts for VOCs abatement, with a focus on three typical strategies: defect engineering, heterostructure construction, and composite system integration. The mechanisms, performance advantages, and existing issues of each strategy are systematically analyzed and compared. Considering the current bottlenecks, such as low quantum yield, intermediate accumulation, and poor adaptability to real-world environments, we put forward future research directions: balancing activity and stability, comprehensively revealing reaction mechanisms, and facilitating industrial translation. This review offers a theoretical foundation for the design of efficient TiO2-based photocatalysts for practical air purification.","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"96 9","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148926837","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

Study of the Crystal Structure and Thermochemical Properties of Lithium Carbonate 碳酸锂晶体结构及热化学性质的研究

IF 1 4区化学

Russian Journal of General Chemistry Pub Date : 2026-09-05 DOI: 10.1134/S107036322616005X

M. V. Shestakov

{"title":"Study of the Crystal Structure and Thermochemical Properties of Lithium Carbonate","authors":"M. V. Shestakov","doi":"10.1134/S107036322616005X","DOIUrl":"10.1134/S107036322616005X","url":null,"abstract":"Lithium carbonate is of enormous interest to researchers because of its widespread use as a reagent and its formation as a component of the solid electrolyte during the operation of lithium batteries. This article presents an X-ray diffraction study of the crystal structure of chemically pure monoclinic lithium carbonate. The X-ray diffraction pattern of lithium carbonate was recorded using synchrotron radiation with a wavelength of 0.688199 Å in Debye–Scherrer geometry over a 2θ angular range from 2° to 70° and analyzed by full-profile Rietveld refinement, including refinement of the unit-cell parameters and ion positions. After refinement of the crystal structure, the ion positions in the unit cell were relaxed within the density functional theory framework using the Broyden–Fletcher–Goldfarb–Shanno algorithm implemented in Quantum ESPRESSO, where the atoms were modeled using pseudopotentials. The refined and optimized crystal structures were formally compared by determining the maximum difference between equivalent positions of identical ions, the arithmetic mean of the differences between the coordinates of equivalent positions, and the similarity measure. The thermochemical properties were studied experimentally over the temperature range from 25 to 900°C in a flowing air–argon mixture using a simultaneous thermal analyzer in thermogravimetric analysis–differential scanning calorimetry mode. The resulting data were used to determine the melting point of lithium carbonate and to discuss its mass loss, decomposition mechanism, and possible interaction with the crucible material over the specified temperature range.","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"96 9","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148926708","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

Synthesis and Biological Activity of New Schiff Bases Based on Annulated 2-Amino-3-cyanothiophenes 基于环状2-氨基-3-氰噻吩的新型席夫碱的合成及其生物活性

IF 1 4区化学

Russian Journal of General Chemistry Pub Date : 2026-09-04 DOI: 10.1134/S1070363226601572

Hasmik R. Martirosyan, Siranush V. Dilanyan, Artur A. Hambardzumyan, Armen S. Sargsyan, Rafayel E. Muradyan, Zhanna M. Buniatyan, Levon A. Martirosyan, Anna G. Sukiasyan, Harutyun A. Karapetyan, Mark Yu. Danghyan, Artur A. Harutyunyan

引用次数: 0

2-Methylimidazole-Regulated MIL-88B(Fe) with Enhanced Peroxidase-Like Activity for Colorimetric Glucose Sensing 2-甲基咪唑调节的MIL-88B（Fe）具有增强的过氧化物酶样活性，用于比色葡萄糖传感

IF 1 4区化学

Russian Journal of General Chemistry Pub Date : 2026-09-04 DOI: 10.1134/S1070363226602917

Yan Qing, Chunxiao Chai, Kuan Li, Ye Jiang, Jingjing Li

引用次数: 0

Thermochemical Parameters of Solution, Solvation, and Vaporization of n-Alkyl Formates at 298.15 K 298.15 K下甲酸正烷基酯溶液、溶剂化和汽化的热化学参数

IF 1 4区化学

Russian Journal of General Chemistry Pub Date : 2026-09-04 DOI: 10.1134/S1070363226602802

Ruslan N. Nagrimanov, Rezeda L. Sibgatullina, Darya V. Rudakova, Aliya R. Sirazieva, Aizat A. Samatov

引用次数: 0

Synthesis, Crystal Structures, DFT Calculations, Molecular Docking Studies Against Cyclin-Dependent Kinase and Molecular Dynamic Simulations of Novel Isatin–Isoxazoline Hybrids 合成、晶体结构、DFT计算、周期蛋白依赖性激酶的分子对接研究和新型异烟唑啉-异烟唑啉杂合体的分子动力学模拟

IF 1 4区化学

Russian Journal of General Chemistry Pub Date : 2026-09-04 DOI: 10.1134/S1070363226602206

Nohaila Rharmili, Amal Haoudi, Basavarajaiah Suliphuldevara Mathada, Olivier Blacque, Prashantha Karunakar, Adavala Venkatesulu, Youssef Kandri Rodi, Fouad Ouazzani Chahdi, Joel T. Mague, Ahmed Mazzah, Nada Kheira Sebbar

引用次数: 0

Synthesis of Pyrimido[4,5-b][1,5]benzo- and -Naphthodiazepines 嘧啶[4,5-b][1,5]苯并和-萘二氮卓类化合物的合成

IF 1 4区化学

Russian Journal of General Chemistry Pub Date : 2026-09-04 DOI: 10.1134/S1070363226601304

Ekaterina S. Ofitserova, Artem A. Shklyarenko, Leonid V. Myznikov

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Multi-Walled Carbon Nanotubes as a Chemical Modifier in Alkali-Activated GGBS Concrete Incorporating Cashew Nut Shell Ash 多壁碳纳米管作为碱活化腰果壳灰GGBS混凝土的化学改性剂

IF 1 4区化学

Russian Journal of General Chemistry Pub Date : 2026-09-04 DOI: 10.1134/S1070363225605198

Jebakumar Jensika Rani, Gladston Hemalatha, Sonobonia Nagaraju

{"title":"Multi-Walled Carbon Nanotubes as a Chemical Modifier in Alkali-Activated GGBS Concrete Incorporating Cashew Nut Shell Ash","authors":"Jebakumar Jensika Rani, Gladston Hemalatha, Sonobonia Nagaraju","doi":"10.1134/S1070363225605198","DOIUrl":"10.1134/S1070363225605198","url":null,"abstract":"This study examines the performance of ground granulated blast furnace slag (GGBS)-based alkali-activated concrete incorporating cashew nut shell ash (CNSA) as a supplementary binder and multi-walled carbon nanotubes (MWCNTs) as a nano-additive. CNSA replaced 20% of GGBS, while MWCNTs were added at 0–0.4% of binder weight. A 12 M sodium hydroxide solution served as the alkali activator, with a high-pH dispersion method ensuring uniform MWCNT distribution. Tests on workability, density, mechanical strength, electrical resistivity, and durability (water absorption and RCPT) were conducted, supported by SEM microstructural analysis. Results show that CNSA enhances workability, strength, and durability, while MWCNTs further improve mechanical and durability properties and boost electrical conductivity. Optimal performance occurred at 20% CNSA and 0.2% MWCNTs, linked to improved gel formation, matrix densification, and crack-bridging. Excess MWCNTs caused agglomeration, reducing performance. The combined use of CNSA and MWCNTs offers a sustainable route to high-performance alkali-activated concrete.","PeriodicalId":761,"journal":{"name":"Russian Journal of General Chemistry","volume":"96 9","pages":""},"PeriodicalIF":1.0,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148926432","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

1,3-Dipolar Cycloaddition of Azomethine Ylides Generated from Isatin to Some Phosphorylated Alkynes 由Isatin生成的亚甲基酰体与一些磷酸化炔的1,3-偶极环加成

IF 1 4区化学

Russian Journal of General Chemistry Pub Date : 2026-09-04 DOI: 10.1134/S1070363226601596

Elizaveta V. Bulgakova, Dmitry M. Egorov

引用次数: 0