Pub Date : 2024-09-01DOI: 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
A silver phosphine complex (XantPhos)AgBr proved to be a cheap and readily accessible catalyst for bromofluoro- cyclopropanation of electron-rich alkenes with CFBr2CO2Na. Ozonolysis followed by treatment with NaHSO3 was shown to be an effective protocol to purify gem-bromofluoro- cyclopropanes from unreacted alkene precursors.
{"title":"(XantPhos)AgBr as a cheap and readily available catalyst for the bromofluorocyclopropanation of electron-rich alkenes","authors":"Maxim A. Novikov, Angelina Yu. Bobrova, Anton A. Servetnik, Elena I. Chernoburova, Igor V. Zavarzin, 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}
Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.007
Aleksandr I. Gusev, Albina A. Valeeva
For the first time, the elastic constants c11, c12, and c44 of disordered cubic titanium monoxide TiOy were determined depending on the oxygen content y in the homogeneity region from TiO0.80 to TiO1.25. It has been established that the values of the elastic moduli depend on the oxygen content y and the crystallographic direction [hkl ]. Large changes in the elastic characteristics of TiOy depending on the [hkl ] direction indicate a strong anisotropy of the elasticity of disordered cubic titanium monoxide.
{"title":"Anisotropy of elastic properties of disordered cubic titanium monoxide TiOy","authors":"Aleksandr I. Gusev, 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}
Pub Date : 2024-09-01DOI: 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
For the first time, kinetic data on the decomposition of N2O over mixed oxide LaCoO3 with a perovskite structure have been obtained. Bulk LaCoO3 synthesized using microwave activation exhibited an increased intrinsic reaction rate with a 30 kJ mol–1 lower activation energy. Perovskite samples supported on ZrO2-La demonstrated lower intrinsic reaction rates due to the lower content of the LaCoO3 phase, but the activation energies were also lower by 50–80 kJ mol–1.
{"title":"Kinetics of N2O decomposition over bulk and supported LaCoO3 perovskites","authors":"Petr V. Zemlianskii , Alexander L. Kustov , Gennady I. Kapustin , Nikolay A. Davshan , Konstantin B. Kalmykov , Vladimir V. Chernyshev , 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}
Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.031
Olga Yu. Vdovina, Ruslan R. Galimullin, Marat F. Abdullin, Alexander V. Smirnov, Sergey V. Kolesov
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.
{"title":"Formation of active centers of polymer catalysts for radical-coordination polymerization","authors":"Olga Yu. Vdovina, Ruslan R. Galimullin, Marat F. Abdullin, Alexander V. Smirnov, 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}
Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.038
Mikhail P. Kurlykin, Nina D. Kozina, Tatyana Yu. Kirila, Alexander P. Filippov, Andrey V. Tenkovtsev
Thermosensitivestar-shapedpoly-N-acyl-1,3-propylenimines with a macrocyclic trianglamine core were synthesized using a ‘grafting-on’ approach involving polymerization of 2-alkyl-5,6-dihydro-4H-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.
{"title":"Star-shaped thermosensitive poly-N-acyl-1,3-propylenimines with trianglamine core","authors":"Mikhail P. Kurlykin, Nina D. Kozina, Tatyana Yu. Kirila, Alexander P. Filippov, 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}
Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.024
Gulnara N. Kadikova, Ekaterina S. Meshcheryakova, Leonard M. Khalilov
The cycloaddition reactions of N-phenylmaleimide with 7-substituted cyclohepta-1,3,5-trienes afforded new 4-aza- tetracyclo[5.3.2.02,6.08,10]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.
通过 N-苯基马来酰亚胺与 7-取代的环庚烷-1,3,5-三烯的环加成反应，可以得到新的 4-氮杂四环[5.3.2.02,6.08,10]十二-11-烯-3,5-二酮，收率高达 87-97%。发生[4 + 2]环加成反应的真正底物是 7-R-双环[4.1.0]庚-2,4-二烯同系物。核磁共振光谱和 X 射线衍射分析证明了合成化合物的结构。
{"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, Ekaterina S. Meshcheryakova, 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}
Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.026
Ilya I. Butorin , Olga A. Konovalova , Pavel A. Slepukhin , Svetlana K. Kotovskaya , Vladimir L. Rusinov
New 7-amino-6-nitro-substituted [1,2,4]triazolo- and pyrazolo[1,5-a]pyrimidines were synthesized by an alternative strategy based on amino azoles and 2-nitro-3-(p-tolylamino)acrylonitrile. Unexpectedly, 3,5-dinitro-N-(p-tolyl)pyridine-2,6-diamine was formed when the starting 5-amino-1,2,4-triazoles contained NO2 or CF3 substituents.
{"title":"An alternative synthesis of 7-amino-6-nitro-substituted azolo[1,5-a]pyrimidines","authors":"Ilya I. Butorin , Olga A. Konovalova , Pavel A. Slepukhin , Svetlana K. Kotovskaya , 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}
Pub Date : 2024-09-01DOI: 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
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.
{"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 , Irina A. Os’kina , Danila S. Odintsov , Andrei A. Gismatulin , Ivan A. Azarov , Leonid A. Shundrin , 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}
Pub Date : 2024-09-01DOI: 10.1016/j.mencom.2024.09.015
Zakhar M. Rubanov, Mikhail D. Kosobokov, Vitalij V. Levin, Alexander D. Dilman
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.
{"title":"Visible light-driven decarboxylative alkylation of azomethine imines with carboxylic acids","authors":"Zakhar M. Rubanov, Mikhail D. Kosobokov, Vitalij V. Levin, 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}
Pub Date : 2024-09-01DOI: 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
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.
{"title":"Lead sulfide quantum dots in an organic solar cell active layer","authors":"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","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}
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