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(XantPhos)AgBr as a cheap and readily available catalyst for the bromofluorocyclopropanation of electron-rich alkenes (XantPhos)AgBr 作为富电子烯溴氟环丙烷化反应的廉价易得催化剂
IF 1.8 4区 化学
Mendeleev Communications Pub Date : 2024-09-01 DOI: 10.1016/j.mencom.2024.09.023
Maxim A. Novikov, Angelina Yu. Bobrova, Anton A. Servetnik, Elena I. Chernoburova, Igor V. Zavarzin, Yury V. Tomilov
{"title":"(XantPhos)AgBr as a cheap and readily available catalyst for the bromofluorocyclopropanation of electron-rich alkenes","authors":"Maxim A. Novikov,&nbsp;Angelina Yu. Bobrova,&nbsp;Anton A. Servetnik,&nbsp;Elena I. Chernoburova,&nbsp;Igor V. Zavarzin,&nbsp;Yury V. Tomilov","doi":"10.1016/j.mencom.2024.09.023","DOIUrl":"10.1016/j.mencom.2024.09.023","url":null,"abstract":"<div><div>A silver phosphine complex (XantPhos)AgBr proved to be a cheap and readily accessible catalyst for bromofluoro- cyclopropanation of electron-rich alkenes with CFBr<sub>2</sub>CO<sub>2</sub>Na. Ozonolysis followed by treatment with NaHSO<sub>3</sub> was shown to be an effective protocol to purify <em>gem</em>-bromofluoro- cyclopropanes from unreacted alkene precursors.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 698-700"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433586","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
Anisotropy of elastic properties of disordered cubic titanium monoxide TiOy 无序立方氧化钛 TiOy 弹性特性的各向异性
IF 1.8 4区 化学
Mendeleev Communications Pub Date : 2024-09-01 DOI: 10.1016/j.mencom.2024.09.007
Aleksandr I. Gusev, Albina A. Valeeva
{"title":"Anisotropy of elastic properties of disordered cubic titanium monoxide TiOy","authors":"Aleksandr I. Gusev,&nbsp;Albina A. Valeeva","doi":"10.1016/j.mencom.2024.09.007","DOIUrl":"10.1016/j.mencom.2024.09.007","url":null,"abstract":"<div><div>For the first time, the elastic constants <em>c</em><sub>11</sub>, <em>c</em><sub>12</sub>, and <em>c</em><sub>44</sub> of disordered cubic titanium monoxide TiO<em><sub>y</sub></em> were determined depending on the oxygen content <em>y</em> in the homogeneity region from TiO<sub>0.80</sub> to TiO<sub>1.25</sub>. It has been established that the values of the elastic moduli depend on the oxygen content <em>y</em> and the crystallographic direction [<em>hkl</em> ]. Large changes in the elastic characteristics of TiO<em><sub>y</sub></em> depending on the [<em>hkl</em> ] direction indicate a strong anisotropy of the elasticity of disordered cubic titanium monoxide.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 647-649"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433575","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
Kinetics of N2O decomposition over bulk and supported LaCoO3 perovskites 块状和支撑型 LaCoO3 包晶上的 N2O 分解动力学
IF 1.8 4区 化学
Mendeleev Communications Pub Date : 2024-09-01 DOI: 10.1016/j.mencom.2024.09.009
Petr V. Zemlianskii , Alexander L. Kustov , Gennady I. Kapustin , Nikolay A. Davshan , Konstantin B. Kalmykov , Vladimir V. Chernyshev , Leonid M. Kustov
{"title":"Kinetics of N2O decomposition over bulk and supported LaCoO3 perovskites","authors":"Petr V. Zemlianskii ,&nbsp;Alexander L. Kustov ,&nbsp;Gennady I. Kapustin ,&nbsp;Nikolay A. Davshan ,&nbsp;Konstantin B. Kalmykov ,&nbsp;Vladimir V. Chernyshev ,&nbsp;Leonid M. Kustov","doi":"10.1016/j.mencom.2024.09.009","DOIUrl":"10.1016/j.mencom.2024.09.009","url":null,"abstract":"<div><div>For the first time, kinetic data on the decomposition of N<sub>2</sub>O over mixed oxide LaCoO<sub>3</sub> with a perovskite structure have been obtained. Bulk LaCoO<sub>3</sub> synthesized using microwave activation exhibited an increased intrinsic reaction rate with a 30 kJ mol<sup>–1</sup> lower activation energy. Perovskite samples supported on ZrO<sub>2</sub>-La demonstrated lower intrinsic reaction rates due to the lower content of the LaCoO<sub>3</sub> phase, but the activation energies were also lower by 50–80 kJ mol<sup>–1</sup>.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 653-655"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433576","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
Formation of active centers of polymer catalysts for radical-coordination polymerization 用于自由基配位聚合的聚合物催化剂活性中心的形成
IF 1.8 4区 化学
Mendeleev Communications Pub Date : 2024-09-01 DOI: 10.1016/j.mencom.2024.09.031
Olga Yu. Vdovina, Ruslan R. Galimullin, Marat F. Abdullin, Alexander V. Smirnov, Sergey V. Kolesov
{"title":"Formation of active centers of polymer catalysts for radical-coordination polymerization","authors":"Olga Yu. Vdovina,&nbsp;Ruslan R. Galimullin,&nbsp;Marat F. Abdullin,&nbsp;Alexander V. Smirnov,&nbsp;Sergey V. Kolesov","doi":"10.1016/j.mencom.2024.09.031","DOIUrl":"10.1016/j.mencom.2024.09.031","url":null,"abstract":"<div><div>Chromatography–mass spectrometry of samples representing the interaction products of ferrocene, radical initiator and monomer taken in the molar ratio of 1:2:10 in toluene solution was used for experimental detection of products indicating the structure and mechanism of formation of metal complex active centers of radical-coordination polymerization. Structures similar to those proposed by the quantum-chemical modeling were demonstrated to be formed with the participation of secondary radicals.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 721-724"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433694","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
Star-shaped thermosensitive poly-N-acyl-1,3-propylenimines with trianglamine core 以三聚氰胺为核心的星形热敏性聚 N-酰基-1,3-丙烯亚胺
IF 1.8 4区 化学
Mendeleev Communications Pub Date : 2024-09-01 DOI: 10.1016/j.mencom.2024.09.038
Mikhail P. Kurlykin, Nina D. Kozina, Tatyana Yu. Kirila, Alexander P. Filippov, Andrey V. Tenkovtsev
{"title":"Star-shaped thermosensitive poly-N-acyl-1,3-propylenimines with trianglamine core","authors":"Mikhail P. Kurlykin,&nbsp;Nina D. Kozina,&nbsp;Tatyana Yu. Kirila,&nbsp;Alexander P. Filippov,&nbsp;Andrey V. Tenkovtsev","doi":"10.1016/j.mencom.2024.09.038","DOIUrl":"10.1016/j.mencom.2024.09.038","url":null,"abstract":"<div><div>Thermosensitivestar-shapedpoly-<em>N</em>-acyl-1,3-propylenimines with a macrocyclic trianglamine core were synthesized using a ‘grafting-on’ approach involving polymerization of 2-alkyl-5,6-dihydro-4<em>H</em>-oxazines at free trianglamine. The resulting polymers form complexes with europium ions and curcumin and can be used in the creation of delivery systems for drugs as well as contrast agents for NMR tomography.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 743-744"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433564","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
New 4-azatetracyclo[5.3.2.02,6.08,10]dodec-11-ene-3,5-diones via the cycloaddition of N-phenylmaleimide and cyclohepta-1,3,5-trienes 通过 N-苯基马来酰亚胺和环庚烷-1,3,5-三烯的环化反应制备新的 4-氮杂四环[5.3.2.02,6.08,10]十二-11-烯-3,5-二酮
IF 1.8 4区 化学
Mendeleev Communications Pub Date : 2024-09-01 DOI: 10.1016/j.mencom.2024.09.024
Gulnara N. Kadikova, Ekaterina S. Meshcheryakova, Leonard M. Khalilov
{"title":"New 4-azatetracyclo[5.3.2.02,6.08,10]dodec-11-ene-3,5-diones via the cycloaddition of N-phenylmaleimide and cyclohepta-1,3,5-trienes","authors":"Gulnara N. Kadikova,&nbsp;Ekaterina S. Meshcheryakova,&nbsp;Leonard M. Khalilov","doi":"10.1016/j.mencom.2024.09.024","DOIUrl":"10.1016/j.mencom.2024.09.024","url":null,"abstract":"<div><div>The cycloaddition reactions of <em>N</em>-phenylmaleimide with 7-substituted cyclohepta-1,3,5-trienes afforded new 4-aza- tetracyclo[5.3.2.0<sup>2,6</sup>.0<sup>8,10</sup>]dodec-11-ene-3,5-diones in high yields (87–97%). The true substrates which underwent the [4 + 2] cycloaddition were the 7-R-bicyclo[4.1.0]hepta-2,4-diene tautomers. The structures of the synthesized compounds were proved by NMR spectroscopy and X-ray diffraction analysis.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 701-702"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433569","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
An alternative synthesis of 7-amino-6-nitro-substituted azolo[1,5-a]pyrimidines 7-氨基-6-硝基取代偶氮并[1,5-a]嘧啶的另一种合成方法
IF 1.8 4区 化学
Mendeleev Communications Pub Date : 2024-09-01 DOI: 10.1016/j.mencom.2024.09.026
Ilya I. Butorin , Olga A. Konovalova , Pavel A. Slepukhin , Svetlana K. Kotovskaya , Vladimir L. Rusinov
{"title":"An alternative synthesis of 7-amino-6-nitro-substituted azolo[1,5-a]pyrimidines","authors":"Ilya I. Butorin ,&nbsp;Olga A. Konovalova ,&nbsp;Pavel A. Slepukhin ,&nbsp;Svetlana K. Kotovskaya ,&nbsp;Vladimir L. Rusinov","doi":"10.1016/j.mencom.2024.09.026","DOIUrl":"10.1016/j.mencom.2024.09.026","url":null,"abstract":"<div><div>New 7-amino-6-nitro-substituted [1,2,4]triazolo- and pyrazolo[1,5-<em>a</em>]pyrimidines were synthesized by an alternative strategy based on amino azoles and 2-nitro-3-(<em>p</em>-tolylamino)acrylonitrile. Unexpectedly, 3,5-dinitro-<em>N</em>-(<em>p</em>-tolyl)pyridine-2,6-diamine was formed when the starting 5-amino-1,2,4-triazoles contained NO<sub>2</sub> or CF<sub>3</sub> substituents.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 706-708"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433876","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
Octafluorobiphenyl-4,4’-diyl 9-oxothioxanthene-1,4-diyl polyether – a promising material for organic film based memristors: synthesis, memristive effect and charge transport mechanism 八氟联苯-4,4'-二基 9-氧代硫杂蒽-1,4-二基聚醚--一种用于基于有机薄膜的忆阻器的有前途的材料：合成、忆阻效应和电荷传输机制
IF 1.8 4区 化学
Mendeleev Communications Pub Date : 2024-09-01 DOI: 10.1016/j.mencom.2024.09.013
Inna K. Shundrina , Irina A. Os’kina , Danila S. Odintsov , Andrei A. Gismatulin , Ivan A. Azarov , Leonid A. Shundrin , Vladimir A. Gritsenko
{"title":"Octafluorobiphenyl-4,4’-diyl 9-oxothioxanthene-1,4-diyl polyether – a promising material for organic film based memristors: synthesis, memristive effect and charge transport mechanism","authors":"Inna K. Shundrina ,&nbsp;Irina A. Os’kina ,&nbsp;Danila S. Odintsov ,&nbsp;Andrei A. Gismatulin ,&nbsp;Ivan A. Azarov ,&nbsp;Leonid A. Shundrin ,&nbsp;Vladimir A. Gritsenko","doi":"10.1016/j.mencom.2024.09.013","DOIUrl":"10.1016/j.mencom.2024.09.013","url":null,"abstract":"<div><div>Polycondensation of perfluorobiphenyl with 1,4-dihydroxy- thioxanthen-9-one resulted in the title highly thermally stable polyether containing the thioxanthenone-type electron acceptor in-chain blocks in its structure. Model resistive memory devices based on it as the active medium exhibited a bipolar switching memristive effect with a 4-order difference in resistance between the low and high resistance states. The charge transport in this polyether is quantitatively described by the Nasyrov–Gritsenko model of phonon-assisted electron tunneling between traps.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 667-669"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433578","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
Visible light-driven decarboxylative alkylation of azomethine imines with carboxylic acids 可见光驱动的偶氮亚胺与羧酸的脱羧烷基化反应
IF 1.8 4区 化学
Mendeleev Communications Pub Date : 2024-09-01 DOI: 10.1016/j.mencom.2024.09.015
Zakhar M. Rubanov, Mikhail D. Kosobokov, Vitalij V. Levin, Alexander D. Dilman
{"title":"Visible light-driven decarboxylative alkylation of azomethine imines with carboxylic acids","authors":"Zakhar M. Rubanov,&nbsp;Mikhail D. Kosobokov,&nbsp;Vitalij V. Levin,&nbsp;Alexander D. Dilman","doi":"10.1016/j.mencom.2024.09.015","DOIUrl":"10.1016/j.mencom.2024.09.015","url":null,"abstract":"<div><div>The alkylation of cyclic five-membered azomethine imines with carboxylic acids proceeds under irradiation with 400 nm light using a dual catalytic system consisting of 9-arylacridine and tetrabutylammonium decatungstate. Azomethine imines containing aromatic, heterocyclic and aliphatic groups are suitable for the process providing pyrazolidin-3-ones in 42–98% yields.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 673-675"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433400","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
Lead sulfide quantum dots in an organic solar cell active layer 有机太阳能电池活性层中的硫化铅量子点
IF 1.8 4区 化学
Mendeleev Communications Pub Date : 2024-09-01 DOI: 10.1016/j.mencom.2024.09.012
Jorge Cruz-Gómez , Francisco Javier de Moure-Flores , Sandra Andrea Mayén-Hernández , José Guadalupe Quiñones-Galván , Aruna Devi Rasu Chettiar , Claudia Elena Pérez-García , José Santos-Cruz
{"title":"Lead sulfide quantum dots in an organic solar cell active layer","authors":"Jorge Cruz-Gómez ,&nbsp;Francisco Javier de Moure-Flores ,&nbsp;Sandra Andrea Mayén-Hernández ,&nbsp;José Guadalupe Quiñones-Galván ,&nbsp;Aruna Devi Rasu Chettiar ,&nbsp;Claudia Elena Pérez-García ,&nbsp;José Santos-Cruz","doi":"10.1016/j.mencom.2024.09.012","DOIUrl":"10.1016/j.mencom.2024.09.012","url":null,"abstract":"<div><div>Organic solar cells have been fabricated using various concentrations of lead sulfide quantum dots. Data from Mott–Schottky analysis revealed intriguing changes in the bulk heterojunction layer of the solar cells that were directly related to the addition of the quantum dots. Notably, the highest power conversion efficiency of 5.15% was achieved with the addition of 0.4 wt% lead sulfide quantum dots.</div></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 5","pages":"Pages 664-666"},"PeriodicalIF":1.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433577","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
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