Light-driven H_(2)O_(2) production over redox-active imine-linked covalent organic frameworks  

作　　者：Songlin Zhang Jinwen Hu Wenzhe Shang Jingya Guo Xusheng Cheng Suchan Song Tianna Liu Wei Liu Yantao Shi 

机构地区：[1]School of Chemistry,Dalian University of Technology,Dalian 116024,China

出　　处：《Advanced Powder Materials》2024年第2期76-81,共6页先进粉体材料（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(22002013);the Fundamental Research Funds for the Central Universities(DUT22LAB602);Liao Ning Revitalization Talents Program(XLYC2008032);China Postdoctoral Science Foundation(Grant No.2023M740496).

摘　　要：Imine-linked covalent organic frameworks(COFs)provide distinctive prospects for promoting photocatalytic H_(2)O_(2) production,yet the intricate involvement of imine-derived linkages chemistry under light irradiation remains incompletely elucidated.Here,imine-linked COF-LZU1 demonstrates a visible light-driven H_(2)O_(2) evolution rate of 387μmol g^(-1)h^(-1),particularly,negligible dependence on the sacrificial agents.By virtue of electron paramagnetic spectroscopy and solid-state nuclear magnetic resonance,we experimentally tracked the structure evolution and identified its autooxidation to Wurster's salt mimics under the photocatalytic conditioning.This finding coincides with the radical anion-O_(2)^(-)-governed reaction pathway and is further rationalized with additional theoretical calculations.This study provides insights into both photophysical/photochemical aspects over the imine-linkage structure.

关 键 词：Photocatalysis Imine-linked COF-LZU1 AUTOOXIDATION Wurster's salt mimics H_(2)O_(2) 

分 类 号：F42[经济管理—产业经济]