单体
共价键
拓扑(电路)
共价有机骨架
材料科学
缩聚物
聚合物
纳米技术
组合化学
化学
有机化学
数学
复合材料
组合数学
作者
Zongfan Yang,Wenjing Hao,Xi Su,Ting Zhang,Weihua Chen,Guang Zhang,Лонг Чэн
标识
DOI:10.1021/acs.chemmater.2c00738
摘要
Increasing research interest has been raised in two-dimensional covalent organic frameworks (2D COFs) probably due to their intriguing structural features and versatile functions. However, due to the relatively limited configuration of precursors, the documented 2D COFs to date have been limited to only nine topologies which greatly restricts their development. Herein, we newly designed and synthesized three K-shaped “two-in-one” building units (Ni-Salphen, Cu-Salphen, and Zn-Salphen), which not only feature a special configuration distinguished from the reported monomers but also integrate metallosalphen functional moieties. Self-polycondensation of these K-shaped monomers facilely afforded three new metallosalphen-based COFs (Ni-Salphen-COF, Cu-Salphen-COF, and Zn-Salphen-COF) with an unprecedented tju topology (tju = Tianjin University) that does not exist in the database of ToposPro. Regarding to the densely and uniformly distributed metallosalphens in the skeletons, the photocatalytic bromination performance of the three COFs were further investigated. Among them, Ni-Salphen-COF exhibited the highest performance on both conversion efficiency (>99%) and selectivity (>90%).
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