Rational Conversion of Imine linkages to Amide Linkages in Covalent Organic Frameworks for Photocatalytic Oxidation with Enhanced Photostability

Rui Xue; Yin-Sheng Liu; Ming-Yue Wang; Hao Guo; Wu Yang; Ji-Xi Guo; Guo-Yu Yang

doi:10.1002/cssc.202400732

Rational Conversion of Imine linkages to Amide Linkages in Covalent Organic Frameworks for Photocatalytic Oxidation with Enhanced Photostability

ChemSusChem. 2024 Apr 25:e202400732. doi: 10.1002/cssc.202400732. Online ahead of print.

Authors

Rui Xue¹, Yin-Sheng Liu², Ming-Yue Wang², Hao Guo², Wu Yang², Ji-Xi Guo³, Guo-Yu Yang⁴

Affiliations

¹ Beijing Institute of Technology, School of chemistry and chemical engineering, No. 5, South Street, Zhongguancun, Haidian District, Beijing, P. R. China, 100081, Beijing, CHINA.
² Northwest Normal University, College of Chemistry and Chemical Engineering, East anning road 967, anning disrtict, Lanzhou, Gansu, China, Lanzhou, CHINA.
³ Xinjiang University, College of Chemistry, 666 Shengli Road, Tianshan District, Urumqi, Xinjiang, China, Urumqi, CHINA.
⁴ Beijing Institute of Technology, School of Chemistry and Chemical Engineering, No.5 Zhongguancun South Street, Haidian District, Beijing, China, Beijing, CHINA.

PMID: 38661456
DOI: 10.1002/cssc.202400732

Abstract

Covalent organic frameworks (COFs) and their applications in photocatalysis have been extensively studied, but the instability of imine-linked COFs is an important factor limiting their performance. In this work, two imine-linked COFs were successfully converted to amide-linked COFs through post synthetic modification (PSM). The oxidized COFs presented lower binding energy to O2, exhibited higher photocatalytic activity for oxidation of thioethers and coupling of benzylamines with excellent stability. The present work can serve as a reliable reference for the development of novel highly active and stable COF-based photocatalysts.

Keywords: COFs; Covalent organic frameworks; Oxidation coupling of benzylamines; Oxidation of thioethers; photocatalysis.