Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.042
Nazgul S. Murzakasymova , Nesipkhan A. Bektenov , Kiril V. Serebriakov , Egor S. Yelkin , Mikhail A. Gavrilenko
The citric acid modification produces an intermediate layer on the AB-17-8:C6H8O7 surface; the layer, on one hand, is firmly secured to the surface owing to the electrostatic coupling between the citrate anion and the positively charged trimethylammonium centers of the anion exchanger surface; on the other hand, it has carbonyl groups with a local negative electron density. The sorption of heavy metals cations occurs through coordination interactions via electrostatic mechanism with local centers of negative electron density, in particular, with the carbonylic oxygen atom.
{"title":"Control for selective sorption of heavy metals cations with anion exchanger AB-17-8 by modifying the surface with citrate groups","authors":"Nazgul S. Murzakasymova , Nesipkhan A. Bektenov , Kiril V. Serebriakov , Egor S. Yelkin , Mikhail A. Gavrilenko","doi":"10.1016/j.mencom.2024.09.042","DOIUrl":"10.1016/j.mencom.2024.09.042","url":null,"abstract":"<div><div>The citric acid modification produces an intermediate layer on the AB-17-8:C<sub>6</sub>H<sub>8</sub>O<sub>7</sub> surface; the layer, on one hand, is firmly secured to the surface owing to the electrostatic coupling between the citrate anion and the positively charged trimethylammonium centers of the anion exchanger surface; on the other hand, it has carbonyl groups with a local negative electron density. The sorption of heavy metals cations occurs through coordination interactions <em>via</em> electrostatic mechanism with local centers of negative electron density, in particular, with the carbonylic oxygen atom.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 755-757"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433689","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}
Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.030
Igor S. Mashkovsky , Nadezhda S. Smirnova , Pavel V. Markov , Galina N. Baeva , Anastasia E. Vaulina , Dmitry P. Melnikova , Alexander Yu. Stakheev
A herein proposed PdAu/Al2O3 egg-shell catalyst for selective acetylene hydrogenation combines two factors to provide perfect performance: isolation of Pd1 active sites by Au and an egg-shell distribution of the active phase across the catalyst pellets. The PdAu/Al2O3 catalyst exhibits high acetylene hydrogenation activity at the level of Pd-catalysts and high intrinsic ethylene selectivity of Au-catalysts.
本文提出的一种用于选择性乙炔加氢的 PdAu/Al2O3 蛋壳催化剂结合了两个因素以提供完美的性能：用金隔离 Pd1 活性位点以及活性相在催化剂颗粒上的蛋壳分布。PdAu/Al2O3 催化剂在 Pd 催化剂的水平上表现出较高的乙炔氢化活性，在 Au 催化剂的水平上表现出较高的内在乙烯选择性。
{"title":"Performance of PdAu/Al2O3 egg-shell catalyst with isolated Pd1 sites for selective hydrogenation of acetylene","authors":"Igor S. Mashkovsky , Nadezhda S. Smirnova , Pavel V. Markov , Galina N. Baeva , Anastasia E. Vaulina , Dmitry P. Melnikova , Alexander Yu. Stakheev","doi":"10.1016/j.mencom.2024.09.030","DOIUrl":"10.1016/j.mencom.2024.09.030","url":null,"abstract":"<div><div>A herein proposed PdAu/Al<sub>2</sub>O<sub>3</sub> egg-shell catalyst for selective acetylene hydrogenation combines two factors to provide perfect performance: isolation of Pd<sub>1</sub> active sites by Au and an egg-shell distribution of the active phase across the catalyst pellets. The PdAu/Al<sub>2</sub>O<sub>3</sub> catalyst exhibits high acetylene hydrogenation activity at the level of Pd-catalysts and high intrinsic ethylene selectivity of Au-catalysts.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 718-720"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433693","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}
Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.033
Konstantin O. Titov , Artem N. Sinelnikov , Evgeniia P. Antoshkina , Ulyana I. Zaretskaya , Andrey K. Ratnikov , Ekaterina A. Khakina , Teimur M. Aliev
Substituted 2,5-dimethoxy-2,5-dihydrofurans (cis/trans isomer mixtures) were obtained via the electrochemical oxidation of the corresponding furans in an undivided cell in methanol in the presence of bromides as mediators. The method is suitable for furans containing electron-donating groups.
{"title":"Electrochemical oxidation of furans into 2,5-dimethoxy-2,5-dihydrofurans","authors":"Konstantin O. Titov , Artem N. Sinelnikov , Evgeniia P. Antoshkina , Ulyana I. Zaretskaya , Andrey K. Ratnikov , Ekaterina A. Khakina , Teimur M. Aliev","doi":"10.1016/j.mencom.2024.09.033","DOIUrl":"10.1016/j.mencom.2024.09.033","url":null,"abstract":"<div><div>Substituted 2,5-dimethoxy-2,5-dihydrofurans (<em>cis</em>/<em>trans</em> isomer mixtures) were obtained <em>via</em> the electrochemical oxidation of the corresponding furans in an undivided cell in methanol in the presence of bromides as mediators. The method is suitable for furans containing electron-donating groups.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 729-731"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432105","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}
Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.034
Yulia V. Gyrdymova, Sofya M. Zarubina, Konstantin S. Rodygin
Direct N-vinylation of lactams with calcium carbide water system was performed under super-basic conditions. The vinylation occurred exclusively at NH group leaving CO function intact to afford cyclic N-vinyl amides in yields up to 97%. The obtained products are prospective monomers for the preparation of synthetic peptides.
{"title":"N-Vinylation of lactams with calcium carbide water system","authors":"Yulia V. Gyrdymova, Sofya M. Zarubina, Konstantin S. Rodygin","doi":"10.1016/j.mencom.2024.09.034","DOIUrl":"10.1016/j.mencom.2024.09.034","url":null,"abstract":"<div><div>Direct <em>N</em>-vinylation of lactams with calcium carbide water system was performed under super-basic conditions. The vinylation occurred exclusively at NH group leaving C<img>O function intact to afford cyclic <em>N</em>-vinyl amides in yields up to 97%. The obtained products are prospective monomers for the preparation of synthetic peptides.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 732-733"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432106","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}
Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.025
Sergei V. Nikitin , Nina I. Shlykova , Igor L. Dalinger , Gennady A. Smirnov , Igor N. Melnikov
High energetic compounds of pentanitroisowurtzitane series containing various polynitropyrazolyl substituents attached to the frame through a methylene linker were synthesized in two steps from the corresponding NH precursors and paraformaldehyde. The structures of the compounds obtained were characterized by spectral methods, and their energy characteristics were estimated.
{"title":"Polynitropyrazole derivatives of pentanitroisowurtzitane","authors":"Sergei V. Nikitin , Nina I. Shlykova , Igor L. Dalinger , Gennady A. Smirnov , Igor N. Melnikov","doi":"10.1016/j.mencom.2024.09.025","DOIUrl":"10.1016/j.mencom.2024.09.025","url":null,"abstract":"<div><div>High energetic compounds of pentanitroisowurtzitane series containing various polynitropyrazolyl substituents attached to the frame through a methylene linker were synthesized in two steps from the corresponding <em>NH</em> precursors and paraformaldehyde. The structures of the compounds obtained were characterized by spectral methods, and their energy characteristics were estimated.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 703-705"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433568","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}
Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.037
Alexander E. Tarasov , Alexander A. Grishchuk , Yulia V. Podval’naya , Elmira R. Badamshina , Maria V. Mironova , Mikhail S. Kuzin , Ivan Yu. Skvortsov , Valerii G. Kulichikhin
A series of linear high molecular weight acrylonitrile homopolymers have been synthesized using controlled anionic polymerization. The possibility of producing polyacrylonitrile with a wide range of molecular weights by controlling the concentrations of metal-free initiator and water has been demonstrated. The resulting homopolymers exhibit excellent spinnability.
{"title":"Molecular weight and spinnability of polyacrylonitrile: control with water and 1,8-diazabicyclo[5.4.0]undec-7-ene during anionic polymerization in dimethyl sulfoxide","authors":"Alexander E. Tarasov , Alexander A. Grishchuk , Yulia V. Podval’naya , Elmira R. Badamshina , Maria V. Mironova , Mikhail S. Kuzin , Ivan Yu. Skvortsov , Valerii G. Kulichikhin","doi":"10.1016/j.mencom.2024.09.037","DOIUrl":"10.1016/j.mencom.2024.09.037","url":null,"abstract":"<div><div>A series of linear high molecular weight acrylonitrile homopolymers have been synthesized using controlled anionic polymerization. The possibility of producing polyacrylonitrile with a wide range of molecular weights by controlling the concentrations of metal-free initiator and water has been demonstrated. The resulting homopolymers exhibit excellent spinnability.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 740-742"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433563","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}
Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.040
Inessa A. Efimenko , Alexey S. Kubasov , Nina A. Ivanova , Olga S. Erofeeva , Ludmila I. Demina
A one-step reaction was discovered giving the h3-allyl complex [Pd(h3-C6H9O)(μ-Cl)]2. The formation of the substituted h3-allyl ligand in the complex occurs as a result of the condensation of acetone at room temperature in a solution containing [Pd(PhCN)2Cl2] and organic acids. The structure of the resulting Pdii complex was determined by single crystal X-ray diffraction analysis.
发现了一种一步反应生成 h3-烯丙基配合物 [Pd(h3-C6H9O)(μ-Cl)]2。在室温下，丙酮在含有[Pd(PhCN)2Cl2]和有机酸的溶液中缩合，形成了该配合物中的取代 h3-烯丙基配体。通过单晶 X 射线衍射分析确定了 Pdii 复合物的结构。
{"title":"Unusual condensation of acetone giving η3-allyl ligand in the [Pd(η3-C6H9O)(μ-Cl)]2 complex","authors":"Inessa A. Efimenko , Alexey S. Kubasov , Nina A. Ivanova , Olga S. Erofeeva , Ludmila I. Demina","doi":"10.1016/j.mencom.2024.09.040","DOIUrl":"10.1016/j.mencom.2024.09.040","url":null,"abstract":"<div><div>A one-step reaction was discovered giving the h<sup>3</sup>-allyl complex [Pd(h<sup>3</sup>-C<sub>6</sub>H<sub>9</sub>O)(μ-Cl)]<sub>2</sub>. The formation of the substituted h<sup>3</sup>-allyl ligand in the complex occurs as a result of the condensation of acetone at room temperature in a solution containing [Pd(PhCN)<sub>2</sub>Cl<sub>2</sub>] and organic acids. The structure of the resulting Pd<sup>ii</sup> complex was determined by single crystal X-ray diffraction analysis.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 748-750"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433566","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}
Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.043
Anna V. Sedanova, Maria S. Delyagina, Lidia G. P’yanova, Natalia V. Kornienko, Anastasia V. Vasilevich, Aleksandr V. Lavrenov
The adsorption properties of a carbon sorbent in relation to sulfosalicylic acid in an individual solution and with an added amino acid (arginine or phenylalanine) were determined. It has been shown that the addition of arginine to an aqueous solution of sulfosalicylic acid leads to an increase in the amount of sulfosalicylic acid adsorbed on the carbon sorbent. The sorbents modified in the presence of amino acids showed high adsorption capacity for the methylene blue dye.
{"title":"Comparative analysis of the adsorption properties of a carbon sorbent modified with sulfosalicylic acid solutions in the presence and absence of amino acids","authors":"Anna V. Sedanova, Maria S. Delyagina, Lidia G. P’yanova, Natalia V. Kornienko, Anastasia V. Vasilevich, Aleksandr V. Lavrenov","doi":"10.1016/j.mencom.2024.09.043","DOIUrl":"10.1016/j.mencom.2024.09.043","url":null,"abstract":"<div><div>The adsorption properties of a carbon sorbent in relation to sulfosalicylic acid in an individual solution and with an added amino acid (arginine or phenylalanine) were determined. It has been shown that the addition of arginine to an aqueous solution of sulfosalicylic acid leads to an increase in the amount of sulfosalicylic acid adsorbed on the carbon sorbent. The sorbents modified in the presence of amino acids showed high adsorption capacity for the methylene blue dye.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 758-761"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433570","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}
Pub Date : 2024-07-01DOI: 10.1016/j.mencom.2024.06.022
Mariia M. Efremova , Diana D. Khashimova , Nikita S. Kalinin , Andrey A. Shtyrov , Mikhail N. Ryazantsev , Dar’ya V. Spiridonova , Anastasia I. Govdi , Irina A. Balova
The microwave-assisted cycloaddition of 2,6-disubstituted benzonitrile oxides to 1-iodobuta-1,3-diynes occurs at the iodo-substituted triple bond giving predominantly 5-alkynyl-4-iodo-1,2,3-isoxazoles. The Suzuki–Miyaura and Sonogashira cross-coupling reactions were used for the modification of the thus obtained 4-iodoisoxazoles.
{"title":"Microwave assisted cycloaddition of benzonitrile oxides to 1-iodobuta-1,3-diynes","authors":"Mariia M. Efremova , Diana D. Khashimova , Nikita S. Kalinin , Andrey A. Shtyrov , Mikhail N. Ryazantsev , Dar’ya V. Spiridonova , Anastasia I. Govdi , Irina A. Balova","doi":"10.1016/j.mencom.2024.06.022","DOIUrl":"10.1016/j.mencom.2024.06.022","url":null,"abstract":"<div><p>The microwave-assisted cycloaddition of 2,6-disubstituted benzonitrile oxides to 1-iodobuta-1,3-diynes occurs at the iodo-substituted triple bond giving predominantly 5-alkynyl-4-iodo-1,2,3-isoxazoles. The Suzuki–Miyaura and Sonogashira cross-coupling reactions were used for the modification of the thus obtained 4-iodoisoxazoles.</p></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 4","pages":"Pages 536-539"},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141963699","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}
Pub Date : 2024-07-01DOI: 10.1016/j.mencom.2024.06.033
Anastasiya A. Shesterkina , Victoria S. Zhuravleva , Kristina E. Kartavova , Anna A. Strekalova , Kseniia V. Vikanova , Alexander L. Kustov
The effect of the second metal (Pt, Pd, Ni and Fe) on the activity of copper phyllosilicate-based catalysts was investigated in the selective hydrogenation of dimethyl oxalate to ethylene glycol at 160–200 °C. The prepared catalysts were characterized by XRD, DRIFTS-CO and TEM methods. The conversion achieved over 10Fe/10Cu-PhySi catalyst was 68 % at 200 °C; at the same time, the full conversion with selectivity 98% was obtained at the temperature of 180 °C over a bimetallic 1Pt/Cu-PhySi catalyst.
{"title":"Enhanced performance of bimetallic catalysts based on copper phyllosilicate in the hydrogenation of dimethyl oxalate to ethylene glycol","authors":"Anastasiya A. Shesterkina , Victoria S. Zhuravleva , Kristina E. Kartavova , Anna A. Strekalova , Kseniia V. Vikanova , Alexander L. Kustov","doi":"10.1016/j.mencom.2024.06.033","DOIUrl":"10.1016/j.mencom.2024.06.033","url":null,"abstract":"<div><p>The effect of the second metal (Pt, Pd, Ni and Fe) on the activity of copper phyllosilicate-based catalysts was investigated in the selective hydrogenation of dimethyl oxalate to ethylene glycol at 160–200 °C. The prepared catalysts were characterized by XRD, DRIFTS-CO and TEM methods. The conversion achieved over 10Fe/10Cu-PhySi catalyst was 68 % at 200 °C; at the same time, the full conversion with selectivity 98% was obtained at the temperature of 180 °C over a bimetallic 1Pt/Cu-PhySi catalyst.</p></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 4","pages":"Pages 569-571"},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141963700","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}
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