合成了具有C60-憎水基团-亲水基团结构的新双亲性C60吡咯烷分子(TDPF),采用1 H NMR,13C NMR和MS对其结构进行了表征.通过UV-vis和TEM的实验方法研究了TDPF在水相的聚集行为.结果表明:TDPF在水相能够形成纳米球和梭形纳米聚集体;浓度和...合成了具有C60-憎水基团-亲水基团结构的新双亲性C60吡咯烷分子(TDPF),采用1 H NMR,13C NMR和MS对其结构进行了表征.通过UV-vis和TEM的实验方法研究了TDPF在水相的聚集行为.结果表明:TDPF在水相能够形成纳米球和梭形纳米聚集体;浓度和溶剂对TDPF聚集体形貌有很大的影响.展开更多
Water oxidation is significant in both natural and artificial photosynthesis.In nature,water oxidation occurs at the oxygen‐evolving center of photosystem II,and leads to the generation of oxygen,protons,and electron...Water oxidation is significant in both natural and artificial photosynthesis.In nature,water oxidation occurs at the oxygen‐evolving center of photosystem II,and leads to the generation of oxygen,protons,and electrons.The last two are used for fixation of carbon dioxide to give carbohydrates.In artificial processes,the coupling of water oxidation to evolve O2and water reduction to evolve H2is known as water splitting,which is an attractive method for solar energy conversion and storage.Because water oxidation is a thermodynamically uphill reaction and is kinetically slow,this reaction causes a bottleneck in large‐scale water splitting.As a consequence,the development of new and efficient water oxidation catalysts(WOCs)has attracted extensive attention.Recent efforts have identified a variety of mononuclear earth‐abundant transition‐metal complexes as active and stable molecular WOCs.This review article summarizes recent progress in research on mononuclear catalysts that are based on first‐row transition‐metal elements,namely manganese,iron,cobalt,nickel,and copper.Particular attention is paid to catalytic mechanisms and the key O?O bond formation steps.This information is critical for designing new catalysts that are highly efficient and stable.展开更多
文摘合成了具有C60-憎水基团-亲水基团结构的新双亲性C60吡咯烷分子(TDPF),采用1 H NMR,13C NMR和MS对其结构进行了表征.通过UV-vis和TEM的实验方法研究了TDPF在水相的聚集行为.结果表明:TDPF在水相能够形成纳米球和梭形纳米聚集体;浓度和溶剂对TDPF聚集体形貌有很大的影响.
基金supported by Thousand Talents Program of Chinathe National Natural Science Foundation of China (21101170,21573139,and 21773146)+1 种基金the Fundamental Research Funds for the Central Universitiesthe Research Funds of Shaanxi Normal University
文摘Water oxidation is significant in both natural and artificial photosynthesis.In nature,water oxidation occurs at the oxygen‐evolving center of photosystem II,and leads to the generation of oxygen,protons,and electrons.The last two are used for fixation of carbon dioxide to give carbohydrates.In artificial processes,the coupling of water oxidation to evolve O2and water reduction to evolve H2is known as water splitting,which is an attractive method for solar energy conversion and storage.Because water oxidation is a thermodynamically uphill reaction and is kinetically slow,this reaction causes a bottleneck in large‐scale water splitting.As a consequence,the development of new and efficient water oxidation catalysts(WOCs)has attracted extensive attention.Recent efforts have identified a variety of mononuclear earth‐abundant transition‐metal complexes as active and stable molecular WOCs.This review article summarizes recent progress in research on mononuclear catalysts that are based on first‐row transition‐metal elements,namely manganese,iron,cobalt,nickel,and copper.Particular attention is paid to catalytic mechanisms and the key O?O bond formation steps.This information is critical for designing new catalysts that are highly efficient and stable.
