Russian Chemical Bulletin最新文献_第5页

Regulation of the activity and selectivity of the Pd/C catalyst in the aqueous-phase hydrogenation of furfural by preliminary modification of the functional properties of the carbon support surface during its oxidative treatment 对糠醛水相加氢过程中碳载体表面功能性质的初步修饰对Pd/C催化剂活性和选择性的调控

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-10-17 DOI: 10.1007/s11172-026-5054-7

V. A. Shkrumeliak, R. M. Mironenko, O. B. Belskaya, A. B. Arbuzov, O. V. Gorbunova, T. I. Gulyaeva, I. V. Muromtsev, V. A. Likholobov

{"title":"Regulation of the activity and selectivity of the Pd/C catalyst in the aqueous-phase hydrogenation of furfural by preliminary modification of the functional properties of the carbon support surface during its oxidative treatment","authors":"V. A. Shkrumeliak, R. M. Mironenko, O. B. Belskaya, A. B. Arbuzov, O. V. Gorbunova, T. I. Gulyaeva, I. V. Muromtsev, V. A. Likholobov","doi":"10.1007/s11172-026-5054-7","DOIUrl":"10.1007/s11172-026-5054-7","url":null,"abstract":"<div>The effect of oxidative treatment of thermal grade T900 nanoglobular carbon with a HNO3 solution (20 wt.%) with a duration of 0.5 to 4 h on the structure and functional properties of the carbon surface of the supported palladium catalyst was investigated. As a result of this treatment the pore structure of the carbon material remains virtually unchanged, but its surface becomes significantly enriched with acidic oxygen-containing groups; their concentration depends on the intensity of the formation and destruction of amorphous carbon and other disordered carbon structures. Changes in the functional properties of the T900 surface caused by oxidative treatment lead to an increase in the dispersion of palladium nanoparticles in the Pd/T900 system. Varying the duration of oxidative treatment of T900 affects the catalytic properties of the Pd/T900 system in the aqueous-phase hydrogenation of furfural (423 K, 3.0 MPa). An increase in the concentration of oxygen-containing groups on the surface of T900 during oxidative treatment results in an increase in catalytic activity and selectivity in the formation of 4-oxopentanal and 5-hydroxypentan-2-one.</div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"75 7","pages":"2058 - 2070"},"PeriodicalIF":1.6,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189966","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

Imidazolylmethyl derivatives of amino-containing polymers for rhenium recovery from aqueous solutions 含氨基聚合物的咪唑基甲基衍生物从水溶液中回收铼

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-10-17 DOI: 10.1007/s11172-026-5085-0

A. D. Korobitsyna, O. V. Melchakova, A. V. Pestov, E. O. Zemlyakova, N. V. Pechishcheva

{"title":"Imidazolylmethyl derivatives of amino-containing polymers for rhenium recovery from aqueous solutions","authors":"A. D. Korobitsyna, O. V. Melchakova, A. V. Pestov, E. O. Zemlyakova, N. V. Pechishcheva","doi":"10.1007/s11172-026-5085-0","DOIUrl":"10.1007/s11172-026-5085-0","url":null,"abstract":"<div>The sorption of ReVII on materials based on polyallylamine (PAA), polyethyleneimine (PEI), and polyaminostyrene (PAST) was studied. The derivatives containing imidazolylmethyl groups (IMPAA, IMPEI, and IMPAST), some of which (IMPAA and IMPEI) were additionally treated with epichlorohydrin, were used as sorbents. In the presence of these sorbents, sorption equilibrium is readily (10 min) achieved, adsorption capacity reaches high values (from 391 to 800 mg g−1), and rhenium is efficiently consumed in acidic media. The introduction of the imidazolylmethyl group into the initial polymer chain increases the affinity of the materials to ReVII, enhances the adsorption capacity and, in some cases, improves the selectivity to ReVII in the presence of MoVI ions. The competitive effect of concomitant ions on the adsorption of ReVII decreases in the order SO42− > Cl− > NO3− > MoVI > CuII. For the sorbent modified with epichlorohydrin, the selectivity to ReVII increases even in the presence of excessive amounts of MoVI. In this case, a high adsorption ability is retained, although a slight decrease in the sorption capacity compared to that of the non-crosslinked sorbents is observed.</div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"75 8","pages":"2382 - 2393"},"PeriodicalIF":1.6,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189973","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

Stereochemical features and kinetic model of the heterogeneous catalytic hydrogenation of 5-ethylidene-2-norbornene 5-乙基-2-降冰片烯非均相催化加氢反应的立体化学特征及动力学模型

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-10-17 DOI: 10.1007/s11172-026-5086-z

V. V. Zamalyutin, E. A. Katsman, E. V. Okuneva, V. R. Flid

引用次数: 0

Synthesis and photophysical properties of 2-alkylamino-4-(2-hydroxynaphthalen-1-yl)quinazolinium tetrafluoroborates 2-烷基氨基-4-（2-羟基萘-1-基）四氟硼酸喹唑啉的合成及其光物理性质

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-10-17 DOI: 10.1007/s11172-026-5069-0

E. D. Kazakova, V. O. Cheblokova, A. I. Nemytov, N. P. Belskaya, T. O. Fomin, M. A. Kiskin, I. A. Utepova, O. N. Chupakhin

引用次数: 0

Photocatalytic addition of acceptor alkyl halides to ethyl vinyl ether: synthesis of acetals on a multigram-scale 受体卤化烷基到乙基乙烯醚的光催化加成：多克尺度缩醛的合成

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-10-17 DOI: 10.1007/s11172-026-5061-8

V. V. Levin, S. A. Imaev, A. D. Dilman

引用次数: 0

Modeling of the mechanism of endo—exo-isomerization of dicyclopentadiene hydrogenation products in the presence of AlCl3 AlCl3存在下二环戊二烯加氢产物内外异构化机理的模拟

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-10-17 DOI: 10.1007/s11172-026-5056-5

N. A. Dontsenko, R. S. Shamsiev, V. R. Flid

{"title":"Modeling of the mechanism of endo—exo-isomerization of dicyclopentadiene hydrogenation products in the presence of AlCl3","authors":"N. A. Dontsenko, R. S. Shamsiev, V. R. Flid","doi":"10.1007/s11172-026-5056-5","DOIUrl":"10.1007/s11172-026-5056-5","url":null,"abstract":"<div>The quantum chemical modeling (PBEO/cc-pVTZ) of the catalytic endo—exo-iso-merization of products of dicyclopentadiene hydrogenation, tetrahydrocyclopentadiene, tetrahydrodicyclopentadiene (THDCPD) and dihydrodicyclopentadiene (DHDCPD), showed that the reactions include three steps: hydride ion transfer from endo-THDCPD (endo-DHDCPD) molecule to AlCl3, [1,2]-sigmatropic rearrangement of the carbocation, and backward hydride ion transfer from [AlHCl3]− to the carbocation. The energy profiles and mechanisms of THDCPD and DHDCPD isomerization do not differ substantially. The maximum Gibbs activation energy (ΔG≠298) is achieved in the H− transfer step. The solvation effects (CH2Cl2, CCl4) result in an appreciable decrease in the energy barrier, and the influence of CH2Cl2 turns out to be more significant. The introduction of three solvent molecules into the system leads to an additional decrease in ΔG≠298 of the hydride ion transfer step (38.2 kcal mol−1). It has been shown for the first time that the first reaction step can involve the H atom in both exo- and endo-position. The energy barrier of the exo-H− transfer step is lower (by 1.5 kcal mol−1). The results obtained indicate a principal possibility of endo—exo-isomerization in the product of incomplete dicyclopentadiene hydrogenation, which can be of practical significance. However, it should be taken into account that the isomerization of DHDCPD on AlCl3 can be impeded by the formation of η2-complexes.</div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"75 7","pages":"2079 - 2086"},"PeriodicalIF":1.6,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189704","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

Oxidation of aminofurazans to azofurazans with electrically generated alkali metal hypohalites 用电生成的碱金属次盐将氨基脲脲氧化为偶氮脲

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-10-17 DOI: 10.1007/s11172-026-5098-8

B. V. Lyalin, D. F. Fadeev, A. B. Sheremetev

引用次数: 0

Sandmeyer isatin synthesis. Preparation and cyclization of isonitrosoacetanilides Sandmeyer isatin合成。异硝基乙酰苯胺的制备与环化

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-10-17 DOI: 10.1007/s11172-026-5079-y

A. N. Izmest’ev

引用次数: 0

Fucosylated chondroitin sulfates of Holothuria: ten years of research (2016–2025) at the N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences Holothuria的集中硫酸软骨素：俄罗斯科学院N. D. Zelinsky有机化学研究所十年研究（2016-2025）

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-10-17 DOI: 10.1007/s11172-026-5050-y

A. I. Usov, M. I. Bilan, N. E. Nifantiev

{"title":"Fucosylated chondroitin sulfates of Holothuria: ten years of research (2016–2025) at the N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences","authors":"A. I. Usov, M. I. Bilan, N. E. Nifantiev","doi":"10.1007/s11172-026-5050-y","DOIUrl":"10.1007/s11172-026-5050-y","url":null,"abstract":"<div>Holothurians (sea cucumbers) contain unique sulfated polysaccharides, known as fucosylated chondroitin sulfates (FCSs). These biopolymers have a regular backbone composed of alternating 4-linked β-d-glucuronic acid (GlcA) and 3-linked N-acetyl-β-d-galactosamine (GalNAc) residues with branches, most commonly in the form of single α-l-fucopyranose residues attached to the O(3) atom of GlcA. Fucobiose residues and several other disaccharides may also serve as side chains, and their attachment site can be the O(6) atom of the GalNAc residue. Molecules of FCSs are abundantly sulfated, and sulfate groups can be located at any hydroxy group of the polymer. Fucosylated chondroitin sulfates isolated from various sea cucumber species possess distinct structures, whose specificity is determined by the number and location of substituents in the backbone. These structural features also dictate the biological properties of FCSs. The anticoagulant and antithrombotic activities of FCSs have been well studied; recently, their immunomodulatory, anti-inflammatory, antiviral, antitumor, and antiangiogenic properties have also been reported. Most promising from a practical standpoint is their ability to stimulate hematopoiesis.</div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"75 7","pages":"2011 - 2024"},"PeriodicalIF":1.6,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189967","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 feasibility of obtaining the compound Bi2Si3O9 via annealing from the amorphous state and investigation of the catalytic properties of bismuth germanate and silicate Bi2O3—GeO2 and Bi2O3—SiO2 (25: 75, mol.%) in the oxidative dimerization of methane 研究了从非晶态退火法制备Bi2Si3O9化合物的可行性，研究了锗酸铋、硅酸盐Bi2O3-GeO2和Bi2O3-SiO2 （25.75, mol.%）在甲烷氧化二聚化反应中的催化性能

IF 1.6 4区化学

Russian Chemical Bulletin Pub Date : 2026-10-17 DOI: 10.1007/s11172-026-5089-9

T. V. Bermeshev, S. N. Vereshchagin, M. P. Bundin, O. V. Belousov, A. S. Samoilo, A. N. Zaloga, D. V. Khlystov

{"title":"Study of the feasibility of obtaining the compound Bi2Si3O9 via annealing from the amorphous state and investigation of the catalytic properties of bismuth germanate and silicate Bi2O3—GeO2 and Bi2O3—SiO2 (25: 75, mol.%) in the oxidative dimerization of methane","authors":"T. V. Bermeshev, S. N. Vereshchagin, M. P. Bundin, O. V. Belousov, A. S. Samoilo, A. N. Zaloga, D. V. Khlystov","doi":"10.1007/s11172-026-5089-9","DOIUrl":"10.1007/s11172-026-5089-9","url":null,"abstract":"<div>Partially crystallized amorphous samples with the compositions Bi2O3—GeO2 and Bi2O3—SiO2 (25: 75, mol.%) were obtained in this study; their catalytic properties in the reaction of oxidative dimerization of methane (ODM) were investigated. The annealing of bismuth silicate at various temperatures and holding times did not result in the formation of a compound with the benitoite structure (Bi2Si3O9). The analysis of the phase composition and microstructure of the obtained samples revealed the presence of compounds such as Bi2SiO5, Bi4Si3O12, Bi12SiO20, and SiO2 in three different modifications (cristobalite, tridymite, and quartz), depending on the annealing conditions. The annealing of bismuth germanate leads to the rapid and reliable formation of a compound with the benitoite structure (Bi2Ge3O9). Monolithic samples of bismuth germanate and silicate exhibit low activity in the ODM reaction. The bismuth germanate sample exhibits exclusively deep oxidation of CH4. In contrast, in the presence of the bismuth silicate sample the ODM reaction proceeds with a selectivity of up to 71% for the total C2 hydrocarbons at 820 °C.</div>","PeriodicalId":756,"journal":{"name":"Russian Chemical Bulletin","volume":"75 8","pages":"2416 - 2425"},"PeriodicalIF":1.6,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189971","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