共价键
共轭体系
联苯
氮化碳
石墨烯
共价有机骨架
缩合反应
材料科学
苯
碳纤维
纳米技术
光化学
化学工程
化学
催化作用
聚合物
有机化学
光催化
复合材料
工程类
复合数
作者
Shuai Bi,Can Yang,Wenbei Zhang,Junsong Xu,Lingmei Liu,Dongqing Wu,Xinchen Wang,Yu Han,Qifeng Liang,Fan Zhang
标识
DOI:10.1038/s41467-019-10504-6
摘要
Abstract Construction of organic semiconducting materials with in-plane π-conjugated structures and robustness through carbon-carbon bond linkages, alternatively as organic graphene analogs, is extremely desired for powerfully optoelectrical conversion. However, the poor reversibility for sp 2 carbon bond forming reactions makes them unavailable for building high crystalline well-defined organic structures through a self-healing process, such as covalent organic frameworks (COFs). Here we report a scalable solution-processing approach to synthesize a family of two-dimensional (2D) COFs with trans -disubstituted C = C linkages via condensation reaction at arylmethyl carbon atoms on the basis of 3,5-dicyano-2,4,6-trimethylpyridine and linear/trigonal aldehyde (i.e., 4,4″-diformyl- p -terphenyl, 4,4′-diformyl-1,1′-biphenyl, or 1,3,5-tris(4-formylphenyl)benzene) monomers. Such sp 2 carbon-jointed-pyridinyl frameworks, featuring crystalline honeycomb-like structures with high surface areas, enable driving two half-reactions of water splitting separately under visible light irradiation, comparable to graphitic carbon nitride (g-C 3 N 4 ) derivatives.
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