光催化
共价有机骨架
卟啉
亚胺
共价键
堆积
共轭体系
化学
光化学
材料科学
催化作用
碳纤维
化学工程
有机化学
聚合物
复合材料
工程类
复合数
作者
Rufan Chen,Ji‐Long Shi,Yuan Ma,Guiqing Lin,Xianjun Lang,Cheng Wang
标识
DOI:10.1002/anie.201902543
摘要
Abstract The construction of stable covalent organic frameworks (COFs) for various applications is highly desirable. Herein, we report the synthesis of a novel two‐dimensional (2D) porphyrin‐based sp 2 carbon‐conjugated COF (Por‐sp 2 c‐COF), which adopts an eclipsed AA stacking structure with a Brunauer—Emmett—Teller surface area of 689 m 2 g −1 . Owing to the C=C linkages, Por‐sp 2 c‐COF shows a high chemical stability under various conditions, even under harsh conditions such as 9 m HCl and 9 m NaOH solutions. Interestingly, Por‐sp 2 c‐COF can be used as a metal‐free heterogeneous photocatalyst for the visible‐light‐induced aerobic oxidation of amines to imines. More importantly, in comparison to imine‐linked Por‐COF, the inherent structure of Por‐sp 2 c‐COF equips it with several advantages as a photocatalyst, including reusability and high photocatalytic performance. This clearly demonstrates that sp 2 carbon‐linked 2D COFs can provide an interesting platform for heterogeneous photocatalysis.
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