Ali Z. Zalov, Kerim A. Kuliev, Afet T. Huseynova, Isa A. Jafarov, Nazani A. Novruzova
{"title":"Copper(II) Complexes with 1-[Anilino(2-methoxyanilino)]-3-acetoxy(methoxy)propanethiol-2 and Their Application","authors":"Ali Z. Zalov, Kerim A. Kuliev, Afet T. Huseynova, Isa A. Jafarov, Nazani A. Novruzova","doi":"10.3103/S0027131426700203","DOIUrl":"10.3103/S0027131426700203","url":null,"abstract":"<p>The reactions of copper(II) with 1-(anilino)-3-acetoxypropanethiol-2 (HL<sub>1</sub>, AAPT) and 1-(2-methoxyanilino)]-3-methoxypropanethiol-2 (HL<sub>2</sub>, MMPT) was studied by the extraction-photometric method. The ligands were characterized with IR and NMR spectroscopy. The influence of aqueous phase pH on the formation of Cu(II)L<sub>2</sub> complexes and thermal decomposition were studied. Chloroform was chosen as the best extractant. A single extraction with chloroform extracted 98.6–99.3% of Cu(II). The yield of CuL<sub>2</sub> was maximum at <i>C</i><sub>L</sub> = 0.008 M and did not decompose for 24 h or more than 45 days after extraction. Maximum light absorption is achieved within 10 min. Phase volume ratios of 5 : 5–115 : 5 did not affect the recovery. The optimum acidity is in the range of pH<sub>opt</sub> = 0.3–6.7 (pH<sub>form</sub> = 2.1–4.7). The molar absorption coefficients are ε<sub>480–490</sub> = (4.21–4.26) × 10<sup>4</sup>. Compliance with the fundamental law of light absorption is achieved at <i>C</i><sub>Cu(II)</sub> = 0.16–18 μg/mL. The ratio of components in the complex is 1 : 2. The developed extraction-photometric method was applied to determine copper in pharmaceutical and plant samples.</p>","PeriodicalId":709,"journal":{"name":"Moscow University Chemistry Bulletin","volume":"81 4","pages":"216 - 224"},"PeriodicalIF":0.6,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Dependence of Dynamic Viscosity and Dynamic Elasticity on Deformation Amplitude in Polymer Solutions","authors":"V. N. Matveenko, E. A. Kirsanov","doi":"10.3103/S0027131426700161","DOIUrl":"10.3103/S0027131426700161","url":null,"abstract":"<p>A structural rheological model is used to explain the dynamic measurement results obtained for polyacrylamide and xanthan polymer solutions. The model describes a dependence of dynamic viscosity and dynamic elasticity on deformation amplitude at a fixed shear oscillation frequency. The structural rheological model allows the interpretation of experimental curves caused by the changes in structure of a polymer solution sample under the action of oscillation shear flow. The number of macromolecules bound by contacts to form certain macromolecular associates is an integral characteristic of the structure. No concept of a continuous or discrete relaxation spectrum is used to analyze rheological curves. Experimental data are approximated by the equations of the structural model for individual sections of the deformation amplitude, which correspond to different states of the polymer solution structure.</p>","PeriodicalId":709,"journal":{"name":"Moscow University Chemistry Bulletin","volume":"81 4","pages":"190 - 199"},"PeriodicalIF":0.6,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148699790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ratio of Surfactant Adsorption Values at Various Interfaces when Wetting Hydrophobic Surfaces with Aqueous Solutions of Triton X-100","authors":"V. D. Dolzhikova, Y. G. Bogdanova","doi":"10.3103/S0027131426700100","DOIUrl":"10.3103/S0027131426700100","url":null,"abstract":"<p>Based on the adhesion tension isotherms γ<sub>LV</sub>cosθ = <i>f</i>(γ<sub>LV</sub>), the relationship between the adsorption values of surfactants at the solution/solid surface (Г<sub>SL</sub>) and solution/air (Г<sub>LV</sub>) interfaces was examined by wetting Teflon and polystyrene with aqueous solutions of the nonionic surfactant Triton X-100 (TX-100). The approach presented in this paper demonstrates the feasibility of predicting the wettability of hydrophobic surfaces for practical applications, using an existing database on the surface tension of aqueous surfactant solutions and their adsorption on the surface of solid adsorbents.</p>","PeriodicalId":709,"journal":{"name":"Moscow University Chemistry Bulletin","volume":"81 3","pages":"145 - 151"},"PeriodicalIF":0.5,"publicationDate":"2026-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148141700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. A. Bogush, A. N. Grishanina, S. S. Dorzhieva, E. A. Bogush, A. M. Scherbakov, V. Yu. Kirsanov, E. N. Kosobokova, M. Ya. Melnikov
{"title":"Comprehensive Immunophenotypic Characterization of Sarcoma Cell Cultures by Five Tumor Markers","authors":"T. A. Bogush, A. N. Grishanina, S. S. Dorzhieva, E. A. Bogush, A. M. Scherbakov, V. Yu. Kirsanov, E. N. Kosobokova, M. Ya. Melnikov","doi":"10.3103/S0027131426700112","DOIUrl":"10.3103/S0027131426700112","url":null,"abstract":"<p>Comprehensive immunophenotyping of sarcoma cell cultures was performed for expression of tumor markers associated with key biological characteristics of malignant neoplasms: TUBB3, EMT/MET, PD-L1, ERα, and ERβ. Two pairs of cell cultures with differences in molecular phenotype were formed: metastatic Mg-63 vs. primary MNNG-Hos osteosarcoma and Mg-63 osteosarcoma vs. HT-1080 fibrosarcoma. These pairs may be useful for assessing the contribution of the studied markers to various biological characteristics of tumor cells and studying the interactions between their regulatory mechanisms in mesenchymal tumors.</p>","PeriodicalId":709,"journal":{"name":"Moscow University Chemistry Bulletin","volume":"81 3","pages":"152 - 157"},"PeriodicalIF":0.5,"publicationDate":"2026-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148141699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis and Identification of 2-Methoxy-N-{(1S)-1-phenyl-2-[(prop-2-en-1-yl/prop-2-yn-1-yl)oxy]ethyl}anilines and Their Application to Extractive Spectrophotometric Determination of Copper(II)","authors":"Zalov Ali Zal, Shirinov Elman Giyas, Huseynova Nazile Sadix, Talybov Gulahmed Mirahmad, Yusibova Terane Firqat, Safarova Parvana Siyaper, Hajieva Afet Bahram","doi":"10.3103/S0027131426700136","DOIUrl":"10.3103/S0027131426700136","url":null,"abstract":"<p>The complexation of copper(II) with ligands (L)—2-methoxy-<i>N</i>-{(1<i>S</i>)-1-phenyl-2-[(prop-2-en-1-yl)oxy]ethyl}aniline (L<sub>1</sub>) and 2-methoxy-<i>N</i>-{(1<i>S</i>)-1-phenyl-2-[(prop-2-yn-1-yl)oxy]ethyl}aniline (L<sub>2</sub>)— was studied. The optimal acidity range for the Cu(II)–L<sub>1</sub> (<b>1</b>) and Cu(II)–L<sub>2</sub> (<b>2</b>) complexes is at pH<sub>opt</sub> 3.1–6.2 (pH<sub>form</sub> 1.2–8.7) and pH<sub>opt</sub> 3.3–7.4 (pH<sub>form</sub> 1.3–8.9), respectively. The molar absorption coefficients are ε<sub>445</sub> = 4.21 × 10<sup>4</sup> (for complex <b>1</b>) and ε<sub>450</sub> = 4.37 × 10<sup>4</sup> (for complex <b>2</b>). The composition of the complexes per 1 mole of metal accounts for 2 moles of L<sub>1,2</sub>. On the basis of the results, a photometric method for determination of copper in steel for use in different trade-marks and in food preparation has been proposed.</p>","PeriodicalId":709,"journal":{"name":"Moscow University Chemistry Bulletin","volume":"81 3","pages":"167 - 176"},"PeriodicalIF":0.5,"publicationDate":"2026-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148141705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yu. A. Ustynyuk, Yu. K. Grishin, V. A. Roznyatovsky
{"title":"NMR Spectroscopy for 60 Years at the Chemistry Department of Moscow State University","authors":"Yu. A. Ustynyuk, Yu. K. Grishin, V. A. Roznyatovsky","doi":"10.3103/S0027131426700082","DOIUrl":"10.3103/S0027131426700082","url":null,"abstract":"<p>Since its discovery in 1946, nuclear magnetic resonance spectroscopy become as a method to solve structural and dynamic problems in modern chemistry. Currently, it is hard to find a university in the world without various NMR spectrometers in its laboratories. Achievements in this field, over the course of almost 80 years of its development, were recognized with four Nobel Prizes in Physics and Chemistry. Fifth-generation high-resolution NMR spectrometers were developed during this period. They are as complex measurement and computing systems, in which the latest advances in electronics, cryogenics, and computing technology are utilized. Scientists from the USSR and Russia made the significant contributions to this remarkably rapid progress. This year marks the 60th anniversary of the establishment of the first NMR laboratory at the Faculty of Chemistry of Moscow State University that focused to solve complex chemical problems. The history of its creation and several scientific projects to solve not only specific chemical problems but to develop an NMR methodological arsenal are described in this work.</p>","PeriodicalId":709,"journal":{"name":"Moscow University Chemistry Bulletin","volume":"81 3","pages":"111 - 132"},"PeriodicalIF":0.5,"publicationDate":"2026-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148141697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. D. Varfolomeev, K. M. Solov’ev, I. V. Gachok, S. B. Tsybenova
{"title":"A Kinetic Model for the Accumulation of Metals by Plants: Gold and Rare Earth Elements in Natural Coals of Russia","authors":"S. D. Varfolomeev, K. M. Solov’ev, I. V. Gachok, S. B. Tsybenova","doi":"10.3103/S0027131426700094","DOIUrl":"10.3103/S0027131426700094","url":null,"abstract":"<p>The phenomenon of metal concentration by plants is discussed. The metal content in plants can be tens or hundreds of times higher than the metal content in the soil. A kinetic model of phytomining is developed. The model is verified based on experimental data, the two-chamber nature of the process is demonstrated, a parametric analysis of the model is performed elucidating the role of the metal transfer rate from the geological substrate and metal translocation in the plant, and the dynamics of metal bioaccumulation is described. Natural coals are characterized by exceptionally high ash content (metal content up to 50%) and represent a dynamic reflection of metal concentration over long periods of time. Data on the metal content in many coal deposits of Russia (Moscow Basin, Donetsk Basin, deposits of Siberia) are presented. The phytomining model is extended to a macro-historical timescale (tens and hundreds of millions of years). An increase in metal ash content with the age of coal deposit formation is shown.</p>","PeriodicalId":709,"journal":{"name":"Moscow University Chemistry Bulletin","volume":"81 3","pages":"133 - 144"},"PeriodicalIF":0.5,"publicationDate":"2026-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148141698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. V. Nikolaeva, A. S. Shaibalova, S. V. Palesskiy
{"title":"Elemental Analysis of Candidate Reference Materials for the Composition of Black Shales by Inductively Coupled Plasma Mass Spectrometry","authors":"I. V. Nikolaeva, A. S. Shaibalova, S. V. Palesskiy","doi":"10.3103/S0027131426700124","DOIUrl":"10.3103/S0027131426700124","url":null,"abstract":"<p>For elemental analysis of candidate reference materials for the composition of black shales (SLg-1A and SChS-1A), we used inductively coupled plasma mass spectrometry (ICP-MS) after fusion of samples with lithium metaborate and microwave acid digestion without prefiring. The use of the proposed sample preparation techniques, which offer high speed and ease of implementation, enabled ICP-MS determination of a wide range of elements in each material, including Cd, Mo, Sb, Sn, Te, W, Tl, and Bi, for which data were missing or whose concentrations were evaluated only approximately in SLg-1 and SChS-1 certification. The percentages of analytes were determined in a single measurement cycle on an Element magnetic sector mass spectrometer with low, medium, and high resolution, using external calibration against solutions having a similar matrix composition, in combination with an internal standard in order to reduce the matrix effect and monitor the signal drift. For most elements, the relative standard deviation in ICP-MS analysis is under 10% after fusion and 6 to 20% after acid digestion. We have demonstrated experimentally that, in ICP-MS determinations of Ag and Au in samples, the sample weight should be increased to 1 g to ensure that the sample is representative.</p>","PeriodicalId":709,"journal":{"name":"Moscow University Chemistry Bulletin","volume":"81 3","pages":"158 - 166"},"PeriodicalIF":0.5,"publicationDate":"2026-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148141704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Glycinate Complexes and Models of Their Formation","authors":"Bobonazarzoda Gulrukhsor Bobonazar","doi":"10.3103/S0027131426700070","DOIUrl":"10.3103/S0027131426700070","url":null,"abstract":"<p>The complex formation in a Fe(II)–Fe(III)–Gly–Na(H)ClO<sub>4</sub>–H<sub>2</sub>O system is studied by the method of Clark–Nikolsky oxidation potential at 308.15 K, <i>I</i> = 0.50, <i>C</i><sub>Fe(II)</sub> = <i>C</i><sub>Fe(III)</sub> = 1 × 10<sup>–3</sup>, and <i>C</i><sub>Gly</sub> = 2 × 10<sup>–3</sup> mol/L in a range of pH of 0.5–8.5. The experimental curves of the dependence of the EMF of the system on the concentration parameters such as pH, p<i>C</i><sub>Fe(III)</sub>, p<i>C</i><sub>Fe(II)</sub>, and p<i>C</i><sub>L</sub> are obtained. A method of successive approximations of theoretical and experimental oxidative functions is used for the calculation of the formation constants of the complexes with the use of the Excel program.</p>","PeriodicalId":709,"journal":{"name":"Moscow University Chemistry Bulletin","volume":"81 2","pages":"107 - 110"},"PeriodicalIF":0.5,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of the Composition of CexZr1–xO2 Hydrosols on Their Rheological Properties","authors":"I. V. Ivanov, N. N. Gavrilova, V. V. Nazarov","doi":"10.3103/S0027131426700045","DOIUrl":"10.3103/S0027131426700045","url":null,"abstract":"<p>Ce<sub><i>x</i></sub>Zr<sub>1–<i>x</i></sub>O<sub>2</sub> hydrosols with different particle compositions (<i>x</i> = 0.8, 0.5, 0.2) were synthesized, and flow curves were measured over a wide range of dispersed‑phase concentrations and dispersion‑medium pH values. It was found that, under the conditions studied, the Ce<sub><i>x</i></sub>Zr<sub>1–<i>x</i></sub>O<sub>2</sub> hydrosols behave as Newtonian fluids. At the same time, the Einstein equation is obeyed only within a rather narrow range of dispersed‑phase concentrations. Based on the particle density data and their effective volume fraction, the influence of surface layers on the viscosity increase of the hydrosols was evaluated. The effects of both primary and secondary electroviscosity were identified, and their contributions to the measured viscosity of the hydrosols were shown to depend on the dispersed‑phase concentration, the pH of the dispersion medium, and the particle composition.</p>","PeriodicalId":709,"journal":{"name":"Moscow University Chemistry Bulletin","volume":"81 2","pages":"85 - 91"},"PeriodicalIF":0.5,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}