Russian Journal of Physical Chemistry B最新文献_第3页

Kinetic and Thermodynamic Insights into the pH-Dependent Reaction of Glycine with Ninhydrin for Colorimetric Amino Acid Analysis 甘氨酸与茚三酮ph依赖性氨基酸比色分析反应的动力学和热力学研究

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2026-09-09 DOI: 10.1134/S1990793126700491

Bzhar A. Abdullah, M. T. Kareem

{"title":"Kinetic and Thermodynamic Insights into the pH-Dependent Reaction of Glycine with Ninhydrin for Colorimetric Amino Acid Analysis","authors":"Bzhar A. Abdullah, M. T. Kareem","doi":"10.1134/S1990793126700491","DOIUrl":"10.1134/S1990793126700491","url":null,"abstract":"The reaction between glycine and ninhydrin, a classical colorimetric analyze for amino acids, peptides, and proteins, was investigated through detailed kinetic and thermodynamic analyses to elucidate its mechanistic features and optimize experimental conditions. The study demonstrates that the reaction predominantly follows pseudo-first-order kinetics when either glycine or ninhydrin is present in excess, with the reaction rate largely dependent on the concentration of the limiting reagent. Thermodynamic parameters reveal a moderate activation enthalpy (ΔH* = 65.06 kJ/mol) and activation energy (Ea = 67.57 kJ/mol), while the negative entropy of activation (ΔS* = –69.61 J/mol K) indicates the formation of a structured transition state, consistent with an association type rate determining step. Kinetic measurements across different pH values show that the reaction is highly pH-dependent, exhibiting minimal activity under strongly acidic conditions and maximal rates in the near neutral to mildly alkaline range (pH 6–8). At higher pH (pH 10), the reaction displays sigmoidal kinetics, suggesting altered mechanistic pathways due to extensive deprotonation and potential instability of intermediates. These findings provide comprehensive insights into the glycine ninhydrin system, offering guidance for precise control of experimental parameters, enhanced reproducibility, and improved analytical applications in amino acid and protein quantification.","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":"20 8","pages":"797 - 806"},"PeriodicalIF":1.4,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909542","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

Ru(2,2'-Bipyridyl)3Cl2 Complex with Aluminum Alkyls RxAlH3–х (x = 3, 2)—An Efficient Enhancer of Chemiluminescence Arising from Oxidation of Aluminum Alkyls by Oxygen in Solution Ru（2,2′-联吡啶基）3Cl2与烷基铝配合物RxAlH3 - - - (x = 3,2) -一种烷基铝在溶液中被氧氧化的化学发光增强剂

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2026-08-10 DOI: 10.1134/S1990793126700326

R. G. Bulgakov, K. S. Vasilyuk, S. M. Yakupova, D. I. Galimov

{"title":"Ru(2,2'-Bipyridyl)3Cl2 Complex with Aluminum Alkyls RxAlH3–х (x = 3, 2)—An Efficient Enhancer of Chemiluminescence Arising from Oxidation of Aluminum Alkyls by Oxygen in Solution","authors":"R. G. Bulgakov, K. S. Vasilyuk, S. M. Yakupova, D. I. Galimov","doi":"10.1134/S1990793126700326","DOIUrl":"10.1134/S1990793126700326","url":null,"abstract":"Based on the investigation of spectral-brightness characteristics of chemiluminescence arising from the interaction in the Ru(bpy)3Cl2·6H2O-aluminum alkyl-oxygen system (bpy is 2,2'-bipyridyl), a new quantitative method for determining ruthenium in organic solvents is proposed. Triethylaluminum, triisobutylaluminum, and diisobutylaluminum hydride are taken as aluminum alkyls. The emitter of red glow is the triplet-excited cation ({text{Ru}}left( {{text{bpy}}} right)_{3}^{{2 + *}}) in the Ru(bpy)3Cl2 complex with aluminum alkyl. Linear dependences of the chemiluminescence intensity on the concentration of aluminum alkyl and ruthenium (in the range of [Ru] = 10–7 to 5 × 10–5 mol/L) were established. The obtained linear dependences can be used as calibration for the quantitative determination of ruthenium. Verification measurements of the ruthenium concentration in standard aqueous solutions with the subsequent transfer of ruthenium into the organic phase were carried out, which confirms the practical applicability of the method for the analysis of ruthenium compounds in aqueous media.","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":"20 7","pages":"667 - 671"},"PeriodicalIF":1.4,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699693","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 Synthesis Parameters on Spin Centers and Photoluminescence of Anodic Aluminum Oxide Synthesized in Etidronic Acid 合成参数对依地膦酸合成阳极氧化铝自旋中心和光致发光的影响

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2026-08-10 DOI: 10.1134/S1990793126700405

E. V. Kytina, E. V. Korshunov, S. A. Bolshakov, O. A. Shalygina, M. N. Martyshov, Yu. V. Nazarkina, V. G. Kytin, E. A. Konstantinova, P. P. Shcherbakov

引用次数: 0

Using Solid, Quasi-Solid, Liquid, and Hybrid Electrolytes in Sodium-Ion Battery (SIBs): A Competition of SIBs vs. LIBs for Vehicles 在钠离子电池（sib）中使用固体、准固体、液体和混合电解质：sib与lib的竞争

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2026-08-10 DOI: 10.1134/S1990793126700375

M. Monajjemi, F. Mollaamin, A. Hançerlioğulları

{"title":"Using Solid, Quasi-Solid, Liquid, and Hybrid Electrolytes in Sodium-Ion Battery (SIBs): A Competition of SIBs vs. LIBs for Vehicles","authors":"M. Monajjemi, F. Mollaamin, A. Hançerlioğulları","doi":"10.1134/S1990793126700375","DOIUrl":"10.1134/S1990793126700375","url":null,"abstract":"The global push for sustainable energy has intensified the need for efficient, reliable energy storage, exposing the limitations of lithium-ion batteries (LIBs) due to lithium scarcity and cost. Sodium-ion batteries (SIBs) have emerged as a promising, cost-effective alternative for large-scale stationary storage, especially to support intermittent renewable sources. SIBs rely on reversible sodium-ion intercalation between anodes and cathodes, with electrolytes critically influencing ion transport, electrochemical stability, and overall performance. Electrolytes can be liquid, quasi-solid, solid, or hybrid, each balancing ionic conductivity, mechanical strength, and safety. Key factors include ionic conductivity, cation transference number, electrochemical stability, interfacial resistance, and formation of stable solid electrolyte interphase (SEI) and cathode electrolyte interphase (CEI) layers, which govern charge/discharge kinetics, cycle life, and power density. Liquid electrolytes, often carbonate- or ether-based, remain dominant due to high ionic mobility and compatibility, while emerging hybrid systems aim to combine liquid-like conductivity with solid-state stability, suppressing dendrites and enhancing safety. Optimizing electrolyte properties is central to advancing scalable, high-performance SIBs.","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":"20 7","pages":"691 - 711"},"PeriodicalIF":1.4,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699655","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 Environmental Conditions on Biological Systems. II. Influence of Acoustic Waves, UV, Visible and Microwave Radiation 环境条件对生物系统的影响。2。声波、紫外线、可见光和微波辐射的影响

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2026-08-10 DOI: 10.1134/S1990793126700430

S. G. Gevorkian, D. S. Gevorgyan, Y. A. Dyakov, I. I. Morozov, P. K. Wang

引用次数: 0

First-Principles Investigation of the Thermal Vibration Properties of α-U α-U热振动性质的第一性原理研究

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2026-08-10 DOI: 10.1134/S1990793126700351

Q. Zhehao, W. Xuan, Y. Bangyue, G. Chunlai

引用次数: 0

Synergistic Etching of Diamond Particles Using Fe–CuO Binary System Fe-CuO二元体系协同蚀刻金刚石颗粒

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2026-08-10 DOI: 10.1134/S1990793126700417

C. H. Sun, Z. Y. Ding, C. Lyu, B. Y. Liang

{"title":"Synergistic Etching of Diamond Particles Using Fe–CuO Binary System","authors":"C. H. Sun, Z. Y. Ding, C. Lyu, B. Y. Liang","doi":"10.1134/S1990793126700417","DOIUrl":"10.1134/S1990793126700417","url":null,"abstract":"This paper systematically investigates the synergistic etching behavior and mechanism of diamond particles using a binary Fe–CuO system at 900°C. XRD analysis indicated that a solid-state reaction occurred between Fe and CuO, generating FeO, Cu, and trace amounts of CuFe2O4, with FeO and Fe constituting the active etching medium. SEM observations revealed a distinct crystallographic dependence of the etching effects: the {100} surfaces exhibited regularly arranged square or rectangular etch pits with boundaries aligned along crystallographic directions, showing highly uniform morphologies; while the {111} surfaces displayed numerous ring-shaped etch pits, whose size and density varied significantly with the CuO content. The study demonstrated that CuO content played a key role in modulating the etching behavior: an appropriate addition significantly enhanced etching, particularly on the {111} surfaces and grain boundaries, whereas excessive addition led to weakened etching. Mechanistically, the exothermic Fe–CuO reaction provided localized high temperatures and highly active interfaces; the Fe–FeO synergy established a dynamic redox cycle enabling sustained etching; and CuO facilitated the initial reaction stage through auxiliary reduction and nano-effects.","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":"20 7","pages":"745 - 754"},"PeriodicalIF":1.4,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699730","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

Dielectric Properties of PEO/MC/Graphene Oxide Nanocomposite Films: Experiment, Modeling, and MATLAB Simulation PEO/MC/氧化石墨烯纳米复合膜的介电性能：实验、建模和MATLAB仿真

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2026-08-10 DOI: 10.1134/S1990793126700363

B. M. Alshabander, H. A. Alrubaie, R. Salam

{"title":"Dielectric Properties of PEO/MC/Graphene Oxide Nanocomposite Films: Experiment, Modeling, and MATLAB Simulation","authors":"B. M. Alshabander, H. A. Alrubaie, R. Salam","doi":"10.1134/S1990793126700363","DOIUrl":"10.1134/S1990793126700363","url":null,"abstract":"This work investigates the broadband dielectric response of solution-cast poly (ethylene oxide)/methyl cellulose blend films reinforced with graphene oxide (0–20 wt %). The real and imaginary parts of the permittivity were obtained from capacitance-derived dielectric spectra measured over 12 Hz–30 kHz, and were used to calculate the loss tangent and the alternating-current conductivity. All compositions show a strong low-frequency dispersion attributed to interfacial polarization, with the real permittivity decreasing monotonically with frequency. The alternating-current conductivity follows a universal power-law dependence on frequency, and the extracted exponents indicate a transition from broader, slower dynamics in the neat polymer blend to more dispersive transport after adding graphene oxide. Notably, films with 10–20 wt % graphene oxide exhibit reduced dielectric losses around 1 kHz while maintaining moderate permittivity, defining a practical operating window for energy-conditioning dielectrics. Non-Debye relaxation behavior was quantified using Cole–Cole and Havriliak–Negami functions, and parameter-driven simulations implemented in MATLAB were consistent with the measured spectra. Overall, the results provide composition–property guidance for tuning permittivity and losses in water-processed polymer–graphene oxide dielectrics for capacitors and sensors.","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":"20 7","pages":"678 - 690"},"PeriodicalIF":1.4,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699654","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

A New Type of Short-Living Aerosol Particles—Multiply Charged Clusters 一种新型短寿命气溶胶粒子——多电荷团簇

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2026-08-10 DOI: 10.1134/S1990793126700429

A. I. Nikitin, V. A. Nikitin, A. M. Velichko, T. F. Nikitina

{"title":"A New Type of Short-Living Aerosol Particles—Multiply Charged Clusters","authors":"A. I. Nikitin, V. A. Nikitin, A. M. Velichko, T. F. Nikitina","doi":"10.1134/S1990793126700429","DOIUrl":"10.1134/S1990793126700429","url":null,"abstract":"The characteristics of charged particles generated by an electric current pulse passing through an aqueous sodium bicarbonate solution were studied. Polyethylene terephthalate film, DVD discs, or Kodak black-and-white photographic film with a sensitivity of 100 units were used as particle detectors. Dotted traces of complex shapes and traces of varying intensity but absolutely identical in shape were detected on solid-state detectors. When a particle impacted the photographic film, a loop-shaped trace of metallic silver 0.343 mm wide and 3.22 cm long was formed on it, rounded at the location of a permanent neodymium magnet. A model of the structure of an energetic charged particle is proposed, which is considered as an electric capacitor in the form of a multiply charged water cluster. It was found that the electric field energy of such a cluster can exceed 10–3 J. Based on this, the charge, size, and mass of the cluster were calculated. Analysis of a section of the cluster’s trajectory in a 2 T magnetic field allowed us to calculate the cluster’s velocity along the film surface (6.2 cm/s). It was shown that ions produced during cluster disintegration can be accelerated in the cluster’s electric field to an energy of 3.56 × 105 eV.","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":"20 7","pages":"755 - 763"},"PeriodicalIF":1.4,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699653","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

Monte Carlo Simulation of Structural Modifications in SnO2/Si and Pt-Doped SnO2/Si Heterostructures under 1.25 MeV Co Ion Irradiation 1.25 MeV Co离子辐照下SnO2/Si和pt掺杂SnO2/Si异质结构结构变化的Monte Carlo模拟

IF 1.4 4区化学

Russian Journal of Physical Chemistry B Pub Date : 2026-08-10 DOI: 10.1134/S1990793126700387

A. Y. Boboev, N. Y. Yunusaliyev, G. G. Tojiboyev, M. M. Arabboeva

{"title":"Monte Carlo Simulation of Structural Modifications in SnO2/Si and Pt-Doped SnO2/Si Heterostructures under 1.25 MeV Co Ion Irradiation","authors":"A. Y. Boboev, N. Y. Yunusaliyev, G. G. Tojiboyev, M. M. Arabboeva","doi":"10.1134/S1990793126700387","DOIUrl":"10.1134/S1990793126700387","url":null,"abstract":"We conducted Stopping and Range of Ions in Matter (SRIM) Monte Carlo simulations to investigate how 1.25 MeV cobalt (Co) ions implant into different SnO2-based thin-film structures on silicon (Si) substrates. Three basic configurations were modeled that consisted of pure Si, a bilayer SnO2/Si structure, and a Pt-doped SnO2:Pt/Si heterostructure. Each model was developed according to the unique layer thicknesses, atomic compositions, and densities that were established from experimental and literature sources. The average depth of Co ion scattering during bombardment at 1.25 MeV achieved a projected range of approximately 4667 Å, which correlated with a straggle of 1666 Å. The Co ion distribution was slightly skewed, with a skewness of approximately –0.71, indicating non-uniform scattering that had occurred due to a combination of the two oxides and Si interfaces. Inclusion of platinum into the SnO2 layer generally modified the bonding environment, increased the stability of this lattice structure, and altered the disposition of the Co ions as well. The Si substrate, in contrast, influenced both backscattering and recoil behavior which lead to significantly different defect development and energy loss characteristics for the three sample configurations. These outcomes offer evidence that the SnO2:Pt/Si heterostructure has tunable defect engineering capabilities, where platinum doping in combination with the silicon heterostructure interface allows for stable structures with controlled vacancy charge concentrations. These properties are especially important for gas sensor applications, in which dopant active sites and surface vacancy play an important role in improving sensing selectivity and sensitivity.","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":"20 7","pages":"712 - 719"},"PeriodicalIF":1.4,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699690","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