Russian Journal of Inorganic Chemistry最新文献

Reaction of the [B10H11]– Anion with Dicyanostilbenes

IF 1.8 3区化学

Russian Journal of Inorganic Chemistry Pub Date : 2025-01-20 DOI: 10.1134/S0036023624603532

N. K. Neumolotov, V. V. Voinova, A. P. Zhdanov, N. A. Selivanov, A. Yu. Bykov, A. A. Yakimanskiy, T. G. Chulkova, A. V. Yakimansky, K. Yu. Zhizhin, N. T. Kuznetsov

引用次数: 0

Anti -Oxidant Activity of Trolox: Understanding the Mechanistic Pathway of Oxidation of Trolox by µ-Oxo-Diiron(III) Complex, a Model of Non-Heme Metalloprotein

IF 1.8 3区化学

Russian Journal of Inorganic Chemistry Pub Date : 2025-01-20 DOI: 10.1134/S0036023624602691

Bula Singh

{"title":"Anti -Oxidant Activity of Trolox: Understanding the Mechanistic Pathway of Oxidation of Trolox by µ-Oxo-Diiron(III) Complex, a Model of Non-Heme Metalloprotein","authors":"Bula Singh","doi":"10.1134/S0036023624602691","DOIUrl":"10.1134/S0036023624602691","url":null,"abstract":"The reaction of Trolox-C (TXC), a water-soluble vitamin E analog, with µ-oxo-diiron complex [Fe(III)2(µ-O)(phen)4(H2O)2]Cl4⋅5H2O(1, phen = 1,10-phenanthroline) entailed one-electron oxidations of the phenolic antioxidant with intermediate formation of a phenoxyl radical and accumulation of a quinone end product. These oxidation reactions were linked to individual reductions of complex 1 in acidic buffer media (pH 4.0–5.8), Trolox quantitatively reduces 1 following a first-order reaction kinetics. Each molecule of 1 accepts 2e– from Trolox and is reduced to ferroin, [Fe(phen)3]2+. On oxidation, Trolox produces Trolox quinone. In reaction media, due to successive deprotonations, 1 exists in equilibrium with the species [Fe(III)2(µ-O)(phen)4(H2O)(OH)]3+ (1a) and [Fe(III)2(µ-O)(phen)4(OH)2]2+ (1b) (pKa = 3.71 and 5.28 respectively). The kinetic analyses suggest for an unusual reactivity order as 1 < 1a < 1b. The mechanistic possibilities suggest that while 1, 1a, and 1b are reduced by an ET mechanism. We believe that the initial activation of the bridging µ-oxo group by a proton abstraction results in the higher reactivity of 1b. No variations in media ionic strength suggests for the reaction between one cationic species with other neutral charge species. Positive kinetic isotope effect (kH/kD < 1) indicates for a pre-equilibrium protonation step occur in complex 1.","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 14","pages":"2057 - 2064"},"PeriodicalIF":1.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Investigation of the Effect of Ultrasonic Treatment on Delamination of MXene Ti3C2Tx Particles

IF 1.8 3区化学

Russian Journal of Inorganic Chemistry Pub Date : 2025-01-20 DOI: 10.1134/S0036023624603568

I. E. Arlashkin, S. N. Perevislov, A. A. Sinichkina, V. L. Stolyarova

引用次数: 0

Synthesis of Ti3AlC2 MAX Phase in KBr Protective Melt

IF 1.8 3区化学

Russian Journal of Inorganic Chemistry Pub Date : 2025-01-20 DOI: 10.1134/S0036023624603519

I. A. Nagornov, V. M. Sapronova, Ph. Y. Gorobtsov, A. S. Mokrushin, N. P. Simonenko, E. P. Simonenko, N. T. Kuznetsov

{"title":"Synthesis of Ti3AlC2 MAX Phase in KBr Protective Melt","authors":"I. A. Nagornov, V. M. Sapronova, Ph. Y. Gorobtsov, A. S. Mokrushin, N. P. Simonenko, E. P. Simonenko, N. T. Kuznetsov","doi":"10.1134/S0036023624603519","DOIUrl":"10.1134/S0036023624603519","url":null,"abstract":"The characteristics of the Ti3AlC2 MAX phase in the protective melt of KBr salt have been studied in relation to the synthesis temperature (within the range of 1150–1300°C) and the molar ratio of the initial reagents. It has been established that the synthesis conditions exert a significant influence on the phase composition of the resulting products. X-ray powder diffraction has revealed that the content of the Ti3AlC2 MAX phase exhibits a non-monotonic variation with varying process temperature, reaching maximum values at temperatures of 1175 and 1275°C. The results of the scanning electron microscopy (SEM) and the energy-dispersive X-ray spectroscopy (EDX) mapping experiments have confirmed the formation of the MAX phase at all synthesis temperatures employed, with the highest content recorded at temperatures of 1175 and 1275°C. The thermal behavior of the synthesis products of the Ti3AlC2 MAX phase at temperatures of 1175 and 1275°C (5 h exposure time) has been investigated using a DSC–TGA device. The yield work for the obtained samples has been determined by Kelvin probe force microscopy.","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 14","pages":"2184 - 2192"},"PeriodicalIF":1.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Synthesis of Borylated Amidines Based on Closo-Dodecaborate Anion and Sulfur-Containing Amino Acids

IF 1.8 3区化学

Russian Journal of Inorganic Chemistry Pub Date : 2025-01-20 DOI: 10.1134/S0036023624603556

M. N. Ryabchikova, N. K. Neumolotov, A. V. Nelyubin, N. A. Selivanov, A. Yu. Bykov, A. P. Zhdanov, K. Yu. Zhizhin, N. T. Kuznetsov

引用次数: 0

Effect of Ti2AlC on Sintering of Ultrahigh-Temperature Ceramics Based on HfB2–HfO2–SiC System

IF 1.8 3区化学

Russian Journal of Inorganic Chemistry Pub Date : 2025-01-20 DOI: 10.1134/S0036023624603477

E. P. Simonenko, I. A. Nagornov, A. S. Lysenkov, E. K. Papynov, O. O. Shichalin, A. A. Belov, E. S. Kolodeznikov, A. S. Mokrushin, N. P. Simonenko, N. T. Kuznetsov

{"title":"Effect of Ti2AlC on Sintering of Ultrahigh-Temperature Ceramics Based on HfB2–HfO2–SiC System","authors":"E. P. Simonenko, I. A. Nagornov, A. S. Lysenkov, E. K. Papynov, O. O. Shichalin, A. A. Belov, E. S. Kolodeznikov, A. S. Mokrushin, N. P. Simonenko, N. T. Kuznetsov","doi":"10.1134/S0036023624603477","DOIUrl":"10.1134/S0036023624603477","url":null,"abstract":"The effectiveness of the application of 15 vol % Ti2AlC MAX phase in reducing the consolidation temperature of ultrahigh–temperature ceramics of the HfB2–HfO2–SiC composition was demonstrated through the utilization of both hot pressing and spark plasma sintering techniques. It was observed that the introduction of Ti2AlC enabled an increase in the relative density of the ceramic material from 74 to ~92% at a hot pressing temperature of 1850°C. This resulted in enhanced oxidation resistance when heated in an air current up to a temperature of 1200°C, with a more than 35-fold reduction in mass gain compared to the unmodified sample. It was observed that the density of the ceramic composites increased with the sintering temperature. It was determined that the materials obtained at the lowest temperatures did not contain the Ti2AlC phase, which was introduced into the initial powder mixture as a result of its thermal destruction and interaction with other components of the system. At temperatures exceeding 1400°C, the formation of a solid solution (Hf,Ti)B2 and a cubic HfB/HfC phase occurs, accompanied by the dissolution of titanium as a consequence of the interaction between HfB2 and the Ti2AlC MAX phase.","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 14","pages":"2151 - 2163"},"PeriodicalIF":1.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Solvent, Catalyst, and Precursor: Parameters of Ge(OR)4 Hydrolysis for GeO2 Aerogels Production

IF 1.8 3区化学

Russian Journal of Inorganic Chemistry Pub Date : 2024-12-23 DOI: 10.1134/S0036023624603349

V. O. Veselova, S. Yu. Kottsov, S. V. Golodukhina, A. A. Piryazev, O. M. Gajtko

引用次数: 0

Glycine-Assisted Formation of Nanorods from Rare Earth Oxides

IF 1.8 3区化学

Russian Journal of Inorganic Chemistry Pub Date : 2024-12-23 DOI: 10.1134/S0036023624603337

M. A. Teplonogova, A. A. Kozlova, A. D. Yapryntsev, A. E. Baranchikov, M. M. Khalisov, V. K. Ivanov

{"title":"Glycine-Assisted Formation of Nanorods from Rare Earth Oxides","authors":"M. A. Teplonogova, A. A. Kozlova, A. D. Yapryntsev, A. E. Baranchikov, M. M. Khalisov, V. K. Ivanov","doi":"10.1134/S0036023624603337","DOIUrl":"10.1134/S0036023624603337","url":null,"abstract":"In this paper, a method was proposed for the synthesis of one-dimensional nanoparticles based on new rare earth (RE) compounds, RE hydroxyglycinates. One-dimensional nanoparticles were obtained by the interaction of RE oxides (Y2O3, Eu2O3, Ho2O3, Er2O3, Gd2O3, Sm2O3) with glycine solutions at the molar ratio NH2CH2COOH : RE2O3 = 35 : 1 at 60°C. The thickness of nanoparticles was 50–150 nm and the length was 1–5 μm. FT-IR and Raman spectroscopy, thermal analysis and CHN elemental analysis data allowed to establish that the composition of the hydroxyglycinate nanorods is described by the formula Ln(NH2CH2COO)1.2(OH)1.4(CO3)0.2·1.2H2O. Based on atomic force microscopy data, the Young’s modulus of one-dimensional europium hydroxyglycinate nanoparticles was determined (~35 GPa) and the lower limit of the shear modulus was estimated (( gg )2.0 GPa).","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 14","pages":"1979 - 1986"},"PeriodicalIF":1.8,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143554184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Pt5Mn2Ge, New Platinum-Rich Intermetallic of the Rh5Ge3 Type: Synthesis, Crystal and Electronic Structure, and Magnetic Properties

IF 1.8 3区化学

Russian Journal of Inorganic Chemistry Pub Date : 2024-12-23 DOI: 10.1134/S0036023624603350

A. Yu. Makhaneva, E. Yu. Zakharova, S. N. Nesterenko, S. M. Kazakov, A. N. Kuznetsov

引用次数: 0

First-Principles Calculation of Ion Structures and Transport Properties of NaF–KF–AlF3 Low-Temperature Electrolytes at Various Temperatures

IF 1.8 3区化学

Russian Journal of Inorganic Chemistry Pub Date : 2024-12-23 DOI: 10.1134/S0036023624602642

Yekai Zhang, Laixin Zhang, Hengwei Yan, Zhanwei Liu, Xiumin Chen

{"title":"First-Principles Calculation of Ion Structures and Transport Properties of NaF–KF–AlF3 Low-Temperature Electrolytes at Various Temperatures","authors":"Yekai Zhang, Laixin Zhang, Hengwei Yan, Zhanwei Liu, Xiumin Chen","doi":"10.1134/S0036023624602642","DOIUrl":"10.1134/S0036023624602642","url":null,"abstract":"The research and application of low-temperature aluminum electrolysis technology have become pivotal for the aluminum industry. In this study, first-principles molecular dynamics simulation (FPMD) was employed to investigate the ionic microstructure and transport properties of NaF–KF–AlF3 molten salt with a cryolite ratio of 1.4 and NaF content of 40 mol %, across different temperatures. The computational results indicated that [AlF4]– and [AlF5]2– complexes predominated in the NaF–KF–AlF3 molten salt, with Raman spectroscopy calculations indicating frequencies of 616 cm–1 for [AlF4]–, 552 cm–1 for [AlF5]2–, and 500 cm–1 for [AlF6]3−. The low proportion of bridging F ions indicated a relatively low degree of overall polymerization. In the temperature range of 780–850°C, increased temperature led to increased free Ff ions, while also intensifying the decomposition and aggregation reactions of Al−F ionic groups in the molten salt. Furthermore, the diffusion coefficients for all ions increased. Between 780 and 800°C, the diffusion capabilities of the ions followed the order: K+ > Na+ > F– > Al3+, while between 820 and 850°C, the order shifted to K+ > F– > Na+ > Al3+. The electrical conductivity of the molten salt ranged from 1.2−1.5 S/cm, and its viscosity was in the range of 1.1−1.6 mPa-s.","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 14","pages":"2109 - 2117"},"PeriodicalIF":1.8,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143554179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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