Knoevenagel冷凝
化学
单体
共价键
共价有机骨架
光催化
催化作用
缩合反应
冷凝
纳米技术
组合化学
化学工程
有机化学
聚合物
材料科学
工程类
热力学
物理
作者
Shuai Bi,Thiruvengadam Palani,Shice Wei,Wenbei Zhang,Fan Zhang,Lu-Sha Gao,Junsong Xu,Dongqing Wu,Jie‐Sheng Chen,Fan Zhang
摘要
Vinylene-bridged covalent organic frameworks (COFs) have shown great potential for advanced applications because of their high chemical stability and intriguing semiconducting properties. Exploring new functional monomers available for the reticulation of vinylene-bridged COFs and establishing effective reaction conditions are extremely desired for enlarging the realm of this kind of material. In this work, a series of vinylene-bridged two-dimensional (2D) COFs are synthesized by Knoevenagel condensation of tricyanomesitylene with ditopic or tritopic aromatic aldehydes. With use of appropriate secondary amines as catalysts, high-crystalline vinylene-bridged COFs were achieved, exhibiting long-range ordered structures, well-defined nanochannels, high surface areas (up to 1231 m2 g-1), and excellent photophysical properties. Under a low loading amount and short reaction time, they enable aerobic photocatalytic transformation of arylboronic acids to phenols with high efficiency and excellent recyclability. This work demonstrates a new functional monomer, tricyanomesitylene, feasible for the general synthesis of vinylene-bridged COFs with potential application in photocatalytic organic transformation, which instigates further research on such kind of material.
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