Construction of Fully Conjugated Covalent Organic Frameworks via Facile Linkage Conversion for Efficient Photoenzymatic Catalysis
作者:Yuancheng Wang、Hui Liu、Qingyan Pan、Chenyu Wu、Wenbo Hao、Jie Xu、Renzeng Chen、Jian Liu、Zhibo Li、Yingjie Zhao
DOI:10.1021/jacs.0c00923
日期:2020.4.1
structure are highly desirable. Here, two imine-linked COFs were converted into ultrastable and π-conjugated fused-aromatic thieno[3,2-c]pyridine-linked COFs (B-COF-2 and T-COF-2). The successful conversion was confirmed by infrared and solid-state 13C NMR spectroscopies. Furthermore, the structures of thieno[3,2-c]pyridine-linked COFs were evaluated by transmission electron microscopy and powder X-ray
具有改进的稳定性和扩展的 π 共轭结构的共价有机框架 (COF) 是非常需要的。在这里,两个亚胺连接的 COF 被转化为超稳定和 π 共轭的稠合芳香噻吩并 [3,2-c] 吡啶连接的 COF(B-COF-2 和 T-COF-2)。红外和固态 13C NMR 光谱证实了成功的转化。此外,通过透射电子显微镜和粉末 X 射线衍射图评估了噻吩并 [3,2-c] 吡啶连接的 COF 的结构。值得注意的是,结构上的微小差异会导致完全不同的光活性。以三嗪为核心的完全 π 共轭 T-COF-2 表现出优异的光催化 NADH 再生率,10 分钟内达到 74%。