{"title":"Structure and Stability Constants of Cadmium(II) Complexes with Cryptand[2.2.2]","authors":"V. A. Isaeva, G. A. Gamov, O. A. Bezrukova","doi":"10.1134/S0036024426701451","DOIUrl":"10.1134/S0036024426701451","url":null,"abstract":"<p>The present contribution reports on the stability constants of mononuclear, protonated, and binuclear cadmium(II) complexes with cryptand[2.2.2] in aqueous solution at a temperature of 298 K that were determined potentiometrically. The structure and geometric parameters of cadmium(II) cryptates were elucidated using quantum-chemical calculations. NMR studies of the resulting complexes were performed to confirm their structure.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 9","pages":"1973 - 1983"},"PeriodicalIF":0.7,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148877982","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}
R. Arulnangai, H. Vajihabanu, G. Muralitharan, R. Gomathi, Manuri Brahmayya, Aswini Rangayasami
{"title":"Carbon Nanodots Supported Photocatalysis for Efficient Degradation of Methylene Blue and Microbial Load Reduction from Waste Water","authors":"R. Arulnangai, H. Vajihabanu, G. Muralitharan, R. Gomathi, Manuri Brahmayya, Aswini Rangayasami","doi":"10.1134/S0036024426701657","DOIUrl":"10.1134/S0036024426701657","url":null,"abstract":"<p>Carbon nanodots (CNDs) synthesized from <i>Carica papaya</i> seeds (CP-CNDs) and used for the photocatalytic degradation of methylene blue (MB) and microbial load reduction from wastewater (simulated sample water). This research showed a sustainable method for producing highly effective photocatalyst for the photo-degradation of organic dyes and efficient microbial load removal from wastewater treatment. The as synthesized CP-CNDs have been characterized by Fourier transform infrared spectroscopy (FTIR), high resolution scanning electron microscopy (HR-SEM), measurements, UV–Vis spectroscopy techniques. Carbon nanodots synthesized from Carica papaya seed have a higher antibacterial activity than other photocatalysts because of higher surface area and higher number of reactive sites of the nanodots. Then, under exposure to visible light, the photocatalytic actions of CP-CNDs appear to contain sustained degradation of MB aqueous dye. All these properties make the CP-CNDs an efficient and potential candidate for efficient degradation of methylene blue and microbial load reduction from waste water.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 9","pages":"2200 - 2206"},"PeriodicalIF":0.7,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148877980","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}
P. R. Vasyutin, M. Yu. Sinev, E. Y. Lyubimov, Yu. A. Gordienko, M. A. Panafidin, A. V. Bukhtiyarov, I. P. Prosvirin
{"title":"The Structure of CaxLa1–xAlO3 Aluminates and the Role of Surface Oxygen in the Processes of High-Temperature Catalytic Oxidation of C1–C3 Alkanes","authors":"P. R. Vasyutin, M. Yu. Sinev, E. Y. Lyubimov, Yu. A. Gordienko, M. A. Panafidin, A. V. Bukhtiyarov, I. P. Prosvirin","doi":"10.1134/S0036024426701438","DOIUrl":"10.1134/S0036024426701438","url":null,"abstract":"<p>The structural features and a series of properties of <span>({text{C}}{{{text{a}}}_{x}}{text{L}}{{{text{a}}}_{{1 - x}}}{text{Al}}{{{text{O}}}_{3}})</span> (<i>x</i> = 0–0.3) aluminates have been studied. The limits of stability of the cubic perovskite <span>({text{C}}{{{text{a}}}_{x}}{text{L}}{{{text{a}}}_{{1 - x}}}{text{Al}}{{{text{O}}}_{3}})</span> structure under the isomorphic substitution La<sup>3+</sup> → Ca<sup>2+</sup> have been determined by X-ray diffraction analysis. The dependence of the state of oxygen on the surface of the obtained samples on their composition has been studied by X-ray photoelectron spectroscopy (XPS). Based on a comparison of the XPS data with the catalytic properties of <span>({text{C}}{{{text{a}}}_{x}}{text{L}}{{{text{a}}}_{{1 - x}}}{text{Al}}{{{text{O}}}_{3}})</span> samples in the oxidation of C<sub>1</sub>–C<sub>3</sub> alkanes, it was concluded that point defects (oxygen radical ions O<sup>–</sup> and surface OH<sup>–</sup> groups) are involved in the activation of reactant molecules, hydrocarbons and oxygen.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 9","pages":"1953 - 1965"},"PeriodicalIF":0.7,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148877981","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}
G. Prabakaran, R. Sathyalakshmi, M. Haris, A Dhayal Raj, B. Sahaya Infant Lasalle, Muthu Senthil Pandian, P. Ramasamy
{"title":"Investigation of Structural, Optical, Dielectric, and Third-Order Nonlinear Optical Properties of Benzotriazole Picrate Single Crystal for Optoelectronic Applications","authors":"G. Prabakaran, R. Sathyalakshmi, M. Haris, A Dhayal Raj, B. Sahaya Infant Lasalle, Muthu Senthil Pandian, P. Ramasamy","doi":"10.1134/S0036024426701645","DOIUrl":"10.1134/S0036024426701645","url":null,"abstract":"<p>Organic nonlinear optical (NLO) crystals are widely acknowledged to be an important material in optoelectronics applications due to their molecular nature, in which the molecular structure can be modified through synthetic reactions, leading to improved NLO properties. Picric acid and 1,2,3-benzotriazole (BTP) were used as solvents in methanol to grow BTP crystals using the slow evaporation technique in an ambient environment. Based on structural studies, it was determined that the as-grown crystal had a monoclinic structure and the functional groups were confirmed through spectroscopical analysis. The optical properties of the BTP crystal were investigated using optical spectroscopy analysis in the wavelength range of 200–1200 nm, and its peak wavelength was determined to be at 310 nm. The as-grown BTP crystals display low dielectric loss based on dielectric analysis. Thermogravimetric and Differential Thermal Analysis (TG-DTA) were performed to examine phase transitions and temperature stability of the compound. The positive photoconductivity properties of the crystal were confirmed by photoconductivity measurements. The microhardness test was carried out to assess the mechanical strength of the BTP crystal. Third-order NLO characteristics, including nonlinear index of refraction (<i>n</i><sub>2</sub>), two-photon absorbency coefficient (β), and third-order NLO susceptibility (χ<sup>3</sup>), were estimated using the Z-scan characterization technique.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 9","pages":"2189 - 2199"},"PeriodicalIF":0.7,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148878025","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}
A. V. Knyazev, N. V. Somov, N. N. Smirnova, S. S. Knyazeva, A. V. Markin, Yu. A. Sarmini, A. S. Shipilova, G. A. Knyazev
{"title":"Studying the Heat Capacity and Structure of Dopamine Hydrochloride","authors":"A. V. Knyazev, N. V. Somov, N. N. Smirnova, S. S. Knyazeva, A. V. Markin, Yu. A. Sarmini, A. S. Shipilova, G. A. Knyazev","doi":"10.1134/S0036024426701402","DOIUrl":"10.1134/S0036024426701402","url":null,"abstract":"<p>The temperature dependence of the heat capacity of dopamine hydrochloride is first determined by adiabatic vacuum calorimetry in a range of 83–349 K; extrapolation to 0 K is conducted by the Kelley–Parks method. The following standard thermodynamic functions of crystalline dopamine hydrochloride are determined: heat capacity <span>({{C}^circ_{p}} )</span>(<i>T</i>), enthalpy [<i>H</i>°(<i>T</i>) − <i>H</i>°(0)], entropy <i>S</i>°(<i>T</i>), and Gibbs function [<i>G</i>°(<i>T</i>) − <i>H</i>°(0)] for a temperature range of <i>T</i> → 0 to 350 K. The crystal structure of dopamine hydrochloride is studied by X-ray diffraction analysis at temperatures of 100, 200, 300, and 400 K (space group <i>Pca</i>2<sub>1</sub>); the coefficients of thermal expansion in a temperature range of 100–400 K are calculated. The degradation temperature and thermodynamic characteristics of melting of dopamine hydrochloride are determined by thermogravimetric analysis and differential scanning calorimetry, respectively.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 9","pages":"1921 - 1930"},"PeriodicalIF":0.7,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148878026","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}
A. Kh. Rahimzoda, M. M. Sangov, J. S. Langarieva, T. R. Usacheva, S. M. Safarmamadzoda
{"title":"Copper(II)–1-Methyl-2-mercaptoimidazole Complexation in Water–Ethanol Solvents","authors":"A. Kh. Rahimzoda, M. M. Sangov, J. S. Langarieva, T. R. Usacheva, S. M. Safarmamadzoda","doi":"10.1134/S0036024426701426","DOIUrl":"10.1134/S0036024426701426","url":null,"abstract":"<p>Copper(II)–1-methyl-2-mercaptoimidazole (1MI) complexation in water–ethanol solvents of variable composition is studied by potentiometric titration. It is found that the interaction of Cu<sup>2+</sup> with 1MI in water–ethanol solvents leads to the formation of [Cu<sub>2</sub>1MI]<sup>4+</sup>, [Cu(1MI)<sub>2</sub>]<sup>2+</sup>, [Cu(1MI)<sub>4</sub>]<sup>2+</sup>, and [Cu(1MI)<sub>6</sub>]<sup>2+</sup> complex species. The overall stability constants of the complexes are calculated; the validity of complexation is confirmed by a satisfactory change in the experimental (<i>E</i><sub>exp</sub>) and theoretical electrode potential (<i>E</i><sub>theor</sub>) of the system at each titration point. For copper(II)–1MI complexes in water–ethanol solvents, the dependences of overall stability constants on ethanol concentration exhibit an extreme behavior, except for the [Cu(1MI)<sub>6</sub>]<sup>2+</sup> complex species, for which the stability monotonically decreases with an increase in ethanol concentration. Analysis of the solvation contributions of the chemical reaction participants to the change in the Gibbs energy of transfer shows that the decrease in the stability of the complexes upon transferring from water to water–ethanol solvents is determined by the difference in the solvation contributions of the ions {Δ<sub>tr</sub><i>G</i><sup>0</sup>[Cu(1MI)<sub><i>n</i></sub>]<sup>2+</sup> – ∆<sub>tr</sub><i>G</i><sup>0</sup>(Cu<sup>2+</sup>)}, while the solvation contribution of the ligand is negligible.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 9","pages":"1945 - 1952"},"PeriodicalIF":0.7,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148878130","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}
{"title":"Thermosensitive Hydrogels Based on Combination of Pluronics As New Delivery Systems for Leflunomide","authors":"M. A. Agafonov, D. M. Panuev, I. V. Terekhova","doi":"10.1134/S0036024426701530","DOIUrl":"10.1134/S0036024426701530","url":null,"abstract":"<p>This work is aimed at the preparation and investigation of the properties of thermosensitive hydrogels based on a combination of Pluronics with various architectures for the controlled delivery of leflunomide. In the course of this work, the gelation behavior of Pluronics F127, F68, and L64 was studied. It was shown that the phase transition temperature of F127 solutions increases upon the addition of F68 or L64, enabling optimization of the gelation temperature. Binary hydrogels with the same sol–gel transition temperature (32°С) but varying ratio of Pluronics were obtained. The structural and mechanical properties of the hydrogels were found to correlate with the total weight fraction of Pluronics. Investigation of intermolecular interactions showed a high affinity of leflunomide to F127 and L64 micelles within the polymer matrix of the binary hydrogels. The leflunomide release from the hydrogels was studied in phosphate buffer solution and in biorelevant medium simulating synovial joint fluid.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 9","pages":"2067 - 2073"},"PeriodicalIF":0.7,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148878134","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}
{"title":"Green Synthesis of Bamboo Leaf Extract-Stabilized Silver Nanoparticles via Microwave Irradiation for Antioxidant and Antibacterial Applications","authors":"Ratchaphong Katerung, Jutarat Wattanakul, Narissara Uthai, Duangrutai Thumrongchote, Paramasivam Shanmugam, Priyadharsan Arumugam, Pornpan Pungpo, Mathivathani Kandiah, Supakorn Boonyuen, Thanpisit Phuangchik","doi":"10.1134/S0036024426701542","DOIUrl":"10.1134/S0036024426701542","url":null,"abstract":"<p>Using ethanol maceration, bioactive components were isolated from <i>Dendrocalamus sericeus</i> leaves (<i>D.S.</i> Munro), and their antibacterial and antioxidant properties were assessed. The extract exhibited notable total phenolic (54.870 ± 0.007 µg GAE/mg) and total flavonoid (123.457 ± 12.346 µg QE/mg) contents. It also served as both a capping and reducing agent for the synthesis of silver nanoparticles (AgNPs). The synthesized AgNPs possessed a face-centered cubic (FCC) structure and were spherical shape with an average crystalline size around 10-14 nm. The antibacterial efficiency of the AgNPs was examined by staphylococcus aureus (<i>S. aureus</i>) and Escherichia coli (<i>E. coli</i>), using penicillin as a positive control. The obtained inhibition zone values were determined by 7.2 ± 0.28 mm for <i>E. coli</i> and 6.35 ± 0.49 mm for <i>S. aureus</i>. This study proposed that the bamboo extract have significant antibacterial and antioxidant properties, and efficient stabilizing and reducing agent for synthesis of AgNPs, thus enhanced antibacterial potential for biomedical applications.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 9","pages":"2074 - 2083"},"PeriodicalIF":0.7,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148877967","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}
G. Mohamed Zakriya, Andal. V, G. Jayanthi, R. Jayadharshini, K. Jaya Venkata Prasad, P. Jothika, E. Bhuvaneshwari
{"title":"Moisture Management Properties of Sportswear Finished with AC-ZnO Nanoparticles","authors":"G. Mohamed Zakriya, Andal. V, G. Jayanthi, R. Jayadharshini, K. Jaya Venkata Prasad, P. Jothika, E. Bhuvaneshwari","doi":"10.1134/S003602442670158X","DOIUrl":"10.1134/S003602442670158X","url":null,"abstract":"<p>The fabrics used to make sportswear should be able to regulate moisture levels and maintain heat balance in order to withstand increased perspiration during physical activity. The use of green synthesized activated carbon@zinc oxide (AC@ZnO) nanoparticle-functionalized textiles has shown promise in addressing the aforementioned problem. Green synthesis is used to create ZnO nanoparticles utilizing Artemisia pallen, a plant source, and activated porous carbon from biomass waste. To verify the phase formation and structure, the synthesized nanoparticles were examined using XRD and SEM. The synthesized nanoparticles were functionalized on the fabric in various composition to study its antimicrobial and moisture management properties. From the results, it was observed that the overall moisture management capacity (OMMC) of polypropylene-bamboo fabric is higher than that of the polyester-bamboo fabric. Both polypropylene-bamboo and polyester–bamboo fabrics exhibited effectiveness against Gram‑negative bacteria, and the tensile strength of polypropylene–bamboo fabric was also found to be superior compared to the polyester-bamboo fabric. Hence, AC@ZnO Np functionalized fabrics exhibits improved adsorption capacities and OMMC which facilitates their suitability for the fabrication of sportswear items for athletes.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 9","pages":"2122 - 2134"},"PeriodicalIF":0.7,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148877975","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}
Rajender Boddula, Surnam Narendra, Amit Kumar Rajak, Ramyakrishna Pothu
{"title":"Ceria-assisted One-Pot Sonochemical Synthesis, Characterization and Application of Polyindole/Ceria Nanocomposites","authors":"Rajender Boddula, Surnam Narendra, Amit Kumar Rajak, Ramyakrishna Pothu","doi":"10.1134/S0036024426701633","DOIUrl":"10.1134/S0036024426701633","url":null,"abstract":"<p>Indole is oxidized by ceria in presence of <i>p</i>-toluenesulfonic acid to form polyindole nanocomposite at room temperature for the first time. Sonochemical synthesis of Polyindole/ceria (PIn-CeO<sub>2</sub>) nanocomposites were synthesized sonochemically by solution, emulsion and interfacial polymerization pathways using CeO<sub>2</sub> as a dual-function material, acting both as an oxidizing agent and as an inorganic component. For comparison, PIn-CeO<sub>2</sub> composites are synthesized with the use of strong oxidizing agent, ammonium persulfate. Polyindole composites are characterized by Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, field emission scanning electron microscopy, thermal stability and conductivity measurements. Maximum conductivity of the PIn-CeO<sub>2</sub> composite is obtained with (2.2 × 10<sup>–4</sup> S/cm) without or with ammonium persulfate (2.1 × 10<sup>–5</sup> S/cm) via solution polymerization pathway.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"100 9","pages":"2182 - 2188"},"PeriodicalIF":0.7,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148878019","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}