Safely and highly selective acetylene(C_(2)H_(2))capture is a great challenge,because of its highly explosive nature,as well as its nearly similar molecule size and boiling point toward the main impurity of carbon dio...Safely and highly selective acetylene(C_(2)H_(2))capture is a great challenge,because of its highly explosive nature,as well as its nearly similar molecule size and boiling point toward the main impurity of carbon dioxide(CO_(2)).Adsorption separation has shown a promising future.Herein,a new nanoporous coordination polymer(PCP)adsorbent with fixed and free Cu ions(termed NTU-66-Cu)was prepared through post-synthetic approach via cation exchanging from the pristine NTU-66,an anionic framework with new 3,4,6-c topology and two kinds of cages.The NTU-66-Cu shows significantly improved C_(2)H_(2)/CO_(2)selectivity from 6 to 32(v/v:1/1)or 4 to 4_(2)(v/v:1/4)at low pressure under 298 K,along with enhanced C_(2)H_(2)capacity(from 89.22to 111.53 cm^(3)·g^(-1)).More importantly,this observation was further validated by density functional theory(DFT)calculations and breakthrough experiments under continuous and dynamic conditions.Further,the excellent chemical stability enables this adsorbent to achieve recycle C_(2)H_(2)/CO_(2)separation without loss of C_(2)H_(2)capacity.展开更多
Bile acid synthetic defects(BASD)constitute a rare group of disorders with manifestations in children as well as adults.Diagnosing the individual BASD mandates a lucid understanding of the bile acid synthetic pathway....Bile acid synthetic defects(BASD)constitute a rare group of disorders with manifestations in children as well as adults.Diagnosing the individual BASD mandates a lucid understanding of the bile acid synthetic pathway.However,the synthesis pathway is complex,consisting of numerous enzymes and intermediate products that are volatile in the physician’s memory.Despite paucity of literature,a simplified approach to the BASD is presented in this paper.展开更多
A facile 3-step synthetic approach to 3-halo-4-substituted-l,5-dihydro-4H-1,2,4-triazolme-5-thiones （la--lk） from corresponding unhalogenated 8a---8i was developed based on the strategy of retro-Michael addition, wi...A facile 3-step synthetic approach to 3-halo-4-substituted-l,5-dihydro-4H-1,2,4-triazolme-5-thiones （la--lk） from corresponding unhalogenated 8a---8i was developed based on the strategy of retro-Michael addition, with the key steps being regioselective S-alkylation of compounds 8a-8i with ethyl 3-iodopropionate（12c） and alkaline cleavage of the propionate protecting group via retro-Michael addition. The synthetic approach was characterized by simplicity of operation and wide substrate scope.展开更多
A novel tricomponental condensation leading to p-nitrophenyl- ethyl hydrogen substituted benzylphosphonates was described.The use of these compounds for the synthesis of phosphonopeptide with phosphonamide moiety was ...A novel tricomponental condensation leading to p-nitrophenyl- ethyl hydrogen substituted benzylphosphonates was described.The use of these compounds for the synthesis of phosphonopeptide with phosphonamide moiety was demonstrated.展开更多
Concerning the rise of new media and the imperative to make sense of it in our social world, this collection of essays aims to bring into our studies on new media and communication research some fresh perspectives, bo...Concerning the rise of new media and the imperative to make sense of it in our social world, this collection of essays aims to bring into our studies on new media and communication research some fresh perspectives, both theoretical and practical. Scholars from different areas of expertise contribute to the topic of new media studies by laying bare certain fabrics, structures, and mechanisms that have been operating behind the veil of our prereflective ignorance.展开更多
基金the National Natural Science Foundation of China(No.21671102,21973029)the Innovative Research Team Program by the Ministry of Education of China(No.IRT-17R54)+2 种基金the Hunan Provincial Natural Science Foundation of China(No.2020JJ4290)the Young and Middle-aged Academic Leader of Jiangsu Provincial Blue Project,the Six Talent Peaks Project in Jiangsu Province(No.JY-030)the State Key Laboratory of Materials-Oriented Chemical Engineering(No.ZK201803).We also thank Prof.M.O’Keeffe and Prof.M.Li for valuable suggestion on topology analysis.
文摘Safely and highly selective acetylene(C_(2)H_(2))capture is a great challenge,because of its highly explosive nature,as well as its nearly similar molecule size and boiling point toward the main impurity of carbon dioxide(CO_(2)).Adsorption separation has shown a promising future.Herein,a new nanoporous coordination polymer(PCP)adsorbent with fixed and free Cu ions(termed NTU-66-Cu)was prepared through post-synthetic approach via cation exchanging from the pristine NTU-66,an anionic framework with new 3,4,6-c topology and two kinds of cages.The NTU-66-Cu shows significantly improved C_(2)H_(2)/CO_(2)selectivity from 6 to 32(v/v:1/1)or 4 to 4_(2)(v/v:1/4)at low pressure under 298 K,along with enhanced C_(2)H_(2)capacity(from 89.22to 111.53 cm^(3)·g^(-1)).More importantly,this observation was further validated by density functional theory(DFT)calculations and breakthrough experiments under continuous and dynamic conditions.Further,the excellent chemical stability enables this adsorbent to achieve recycle C_(2)H_(2)/CO_(2)separation without loss of C_(2)H_(2)capacity.
文摘Bile acid synthetic defects(BASD)constitute a rare group of disorders with manifestations in children as well as adults.Diagnosing the individual BASD mandates a lucid understanding of the bile acid synthetic pathway.However,the synthesis pathway is complex,consisting of numerous enzymes and intermediate products that are volatile in the physician’s memory.Despite paucity of literature,a simplified approach to the BASD is presented in this paper.
基金Supported by the Key Projects of Tianjin Science and Technology Support Plan, China（No.16YFZCSY00910）, the Tianjin Natural Science Foundation, China（Nos. 12JCYBJC18800, 13JCQNJC 13700） and the Shandong Natural Science Foundation, China（No.ZR2015BM028）.
文摘A facile 3-step synthetic approach to 3-halo-4-substituted-l,5-dihydro-4H-1,2,4-triazolme-5-thiones （la--lk） from corresponding unhalogenated 8a---8i was developed based on the strategy of retro-Michael addition, with the key steps being regioselective S-alkylation of compounds 8a-8i with ethyl 3-iodopropionate（12c） and alkaline cleavage of the propionate protecting group via retro-Michael addition. The synthetic approach was characterized by simplicity of operation and wide substrate scope.
文摘A novel tricomponental condensation leading to p-nitrophenyl- ethyl hydrogen substituted benzylphosphonates was described.The use of these compounds for the synthesis of phosphonopeptide with phosphonamide moiety was demonstrated.
文摘Concerning the rise of new media and the imperative to make sense of it in our social world, this collection of essays aims to bring into our studies on new media and communication research some fresh perspectives, both theoretical and practical. Scholars from different areas of expertise contribute to the topic of new media studies by laying bare certain fabrics, structures, and mechanisms that have been operating behind the veil of our prereflective ignorance.
