Spiro heterocycles frequently occur in bioactive molecules. In the pursuit of neonicotinoids with spiro hererocycles, three types of novel neonicotinoids with spirobenzofuranone, spirooxindole or spiroacenaphythylenon...Spiro heterocycles frequently occur in bioactive molecules. In the pursuit of neonicotinoids with spiro hererocycles, three types of novel neonicotinoids with spirobenzofuranone, spirooxindole or spiroacenaphythylenone framework were designed and synthesized. Insecticidal evaluation showed that some of spirobenzofuranone containing neonicotinoids exhibited moderate activity against cowpea aphid, armyworm or brown planthopper.展开更多
Developing robust and efficient non-noble electrocatalysts for the hydrogen evolution reaction(HER)is paramount for sustainably producing hydrogen fuel from electrochemical water splitting.Engineering morphology and c...Developing robust and efficient non-noble electrocatalysts for the hydrogen evolution reaction(HER)is paramount for sustainably producing hydrogen fuel from electrochemical water splitting.Engineering morphology and chemical composition are significant for fabricating electrocatalysts with superior activity and durability.Herein,novel Ni-doped CoSe_(2)composites are prepared by a facile one-step hydrothermal method.The optimized 1T-phase Co_(0.75)Ni_(0.25)Se_(2)shows excellent HER performance,exhibiting overpotential of as low as 172 mV at 10 mA·cm^(–2) and a small Tafel slope of 32.4 mV·dec^(–1) in 0.5 mol·L^(-1) H_(2)SO_(4)solution,approaching that of com-mercial Pt/C electrocatalyst(30.7 mV·dec^(–1)).Furthermore,the electrocatalyst possesses superior long-term stability under acidic condition.Physicochemical measurements indicate that the homogeneous nanoparticles morphology,the unique electronic structure,and the 1T-phase are responsible for its superior HER performance.This work comes up with a promising strategy in synthesizing other earth-abundant and low-cost catalysts for industrial applications.展开更多
基金supported by National Natural Science Foundation of China(No.22075063,No.U1932205,No.22102041)Fundamental Research Funds for the Central Universities(FRFCU5710092520)+4 种基金Chinesisch-Deutschen Zentrum für Wissenschaftsf?rderung(M-0281)Natural Science Funds of Heilong jiang Province(No.ZD2019B001)Heilongjiang Touyan Team(HITTY-20190033)"Young Scientist Studio"Chongqing Research Institute of HIT。
基金financial supported by National Basic Research Program of China(973 Program,No.2010CB126100)National High Technology Research Development Program of China(863 Program,No.2011AA10A207)+4 种基金Key Projects in the National Science & Technology Pillar Program(No.2011BAE06B05)National Natural Science Foundation of China(No.21372079)Shanghai Education Committee(No.12ZZ057)the Fundamental Research Funds for the Central Universitiespartly supported by Australia DC Foundation
文摘Spiro heterocycles frequently occur in bioactive molecules. In the pursuit of neonicotinoids with spiro hererocycles, three types of novel neonicotinoids with spirobenzofuranone, spirooxindole or spiroacenaphythylenone framework were designed and synthesized. Insecticidal evaluation showed that some of spirobenzofuranone containing neonicotinoids exhibited moderate activity against cowpea aphid, armyworm or brown planthopper.
基金financially supported by the National Natural Science Foundation of China (Nos. 52002254 and 51773049)the National Program for Support of Top-notch Young Professionals, China Aerospace Science and Technology Corporation-Harbin Institute of Technology Joint Center for Technology Innovation Fund (No. HIT15-1A01)+4 种基金Shanghai Academy of Spaceflight Technology Fund (No. SAST2017-126)the Scientific and Technological Cooperation and Development Fund (No. 2017KJHZ002)Sichuan Science and Technology Program (No. 2020YJ0262)Chunhui Plan of Ministry of Education of China, Fundamental Research Funds for the Central Universities, China (No. YJ201893)State Key Laboratory of Advanced Metals and Materials, China (No. 2019-Z03)。
文摘Developing robust and efficient non-noble electrocatalysts for the hydrogen evolution reaction(HER)is paramount for sustainably producing hydrogen fuel from electrochemical water splitting.Engineering morphology and chemical composition are significant for fabricating electrocatalysts with superior activity and durability.Herein,novel Ni-doped CoSe_(2)composites are prepared by a facile one-step hydrothermal method.The optimized 1T-phase Co_(0.75)Ni_(0.25)Se_(2)shows excellent HER performance,exhibiting overpotential of as low as 172 mV at 10 mA·cm^(–2) and a small Tafel slope of 32.4 mV·dec^(–1) in 0.5 mol·L^(-1) H_(2)SO_(4)solution,approaching that of com-mercial Pt/C electrocatalyst(30.7 mV·dec^(–1)).Furthermore,the electrocatalyst possesses superior long-term stability under acidic condition.Physicochemical measurements indicate that the homogeneous nanoparticles morphology,the unique electronic structure,and the 1T-phase are responsible for its superior HER performance.This work comes up with a promising strategy in synthesizing other earth-abundant and low-cost catalysts for industrial applications.
基金financial supported by National Natural Science Foundation of China(No.21372079)National High Technology Research Development Program of China(863 Program,No. 2011AA10A207)+3 种基金Shanghai Pujiang Program(No.14PJD012)Key Projects in the National Science & Technology Pillar Program(No. 2011BAE06B05)the Fundamental Research Funds for the Central Universitiespartly supported by Australia DC Foundation
文摘An efficient synthetic pathway to 2-oxo-1,2-dihydropyridine-fused 1,3-diaza heterocycles from heterocyclic ketene aminals,phathalic anhydride and ethyl cyanacetate was established.This protocol involved aza-ene reaction/imine-enamine tautomerization/enamine-ester exchange/ring-opening reaction sequence.
