Highly stable dioxin-linked metallophthalocyanine covalent organic frameworks  

作　　者：Zepeng Lei Francisco W.S.Lucas Enrique Canales Moya Shaofeng Huang Yicheng Rong Aaron Wesche Patrick Li Lauren Bodkin Yinghua Jin Adam Holewinski Wei Zhang 

机构地区：[1]Department of Chemistry,University of Colorado Boulder,Boulder,CO 80309,United States [2]Renewable and Sustainable Energy Institute,and Department of Chemical and Biological Engineering,University of Colorado Boulder,Boulder,CO 80309,United States

出　　处：《Chinese Chemical Letters》2021年第12期3799-3802,共4页中国化学快报（英文版）

基　　金：supported by University of Colorado Boulder and K. C. Wong Education Foundation;financial support by the Koch Graduate fellowship。

摘　　要：We report a series of highly stable metallophthalocyanine-based covalent organic frameworks(MPc-dxCOFs) linked by robust 1,4-dioxin bonds constructed through nucleophilic aromatic substitution(SNAr)reaction. The chemical structures and crystallinity of the COFs largely remain unchanged even after treating with boiling water(90°C), concentrated acids(12 mol/L HCl) or bases(12 mol/L Na OH), oxidizing(30% H_(2)O_(2)) or reducing agents(1 mol/L NaBH;) for three days due to their stable M-Pc building blocks and resilient dioxin linkers. With metallated phthalocyanine active sites regularly arranged in the stable framework structures, MPc-dx-COFs can be directly used as efficient electrocatalysts for the oxygen reduction reaction(ORR) without pyrolysis treatment that has commonly been used in previous studies.

关 键 词：Covalent organic framework METALLOPHTHALOCYANINE Nucleophilic aromatic substitution Dioxin linkage ELECTROCATALYSIS Oxygen reduction reaction 

分 类 号：O643.36[理学—物理化学]