Guo Yanyan, Liu Xiaohui, Liu Xiaodong, Xu Na, Wang Xiuli
College of Chemistry and Materials Engineering, Bohai University, Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell, Jinzhou 121013, P. R. China.
Dalton Trans. 2023 Sep 13;52(35):12264-12270. doi: 10.1039/d3dt02116e.
An effective combination of polyoxometalates (POMs) and porous materials is a feasible method to solve the homogeneity of POMs and synthesize extremely stable POM-based catalysts. Herein, by using simple mechanochemical synthesis, we fabricated a series of composites constructed by Keggin-POMs, -phenylenediamine (Pa-1), and 1,3,5-triformylphloroglucinol (Tp), which form a stable covalent organic framework (Keggin-POMs@TpPa-1). Notably, the different Keggin-POMs@TpPa-1 composites showed different catalytic effects on thioether oxidation reaction under mild conditions. From the comparison, the catalytic effect of PW@TpPa-1 with its added amount of 27% HPWO is superior to that of other composites, whose catalytic efficiency can reach 99%. This study provides some inspiration for designing diverse POM-modified catalysts with outstanding stability and efficiency using COFs as supports.
多金属氧酸盐（POMs）与多孔材料的有效结合是解决POMs均相性并合成极其稳定的基于POM的催化剂的可行方法。在此，通过简单的机械化学合成，我们制备了一系列由Keggin型POMs、对苯二胺（Pa-1）和1,3,5-三甲酰基间苯三酚（Tp）构建的复合材料，它们形成了稳定的共价有机框架（Keggin-POMs@TpPa-1）。值得注意的是，不同的Keggin-POMs@TpPa-1复合材料在温和条件下对硫醚氧化反应表现出不同的催化效果。通过比较，添加量为27% HPWO的PW@TpPa-1的催化效果优于其他复合材料，其催化效率可达99%。该研究为以共价有机框架为载体设计具有出色稳定性和效率的多种POM修饰催化剂提供了一些启示。
