Enhanced protonation ability of covalent organic frameworks via N, O-bidentate chelation for photocatalytic H2 evolution

Xing Li; Huaji Pang; Yanqiu Zhu; Yonggang Xiang; Jianxiang Hu; Dekang Huang

doi:10.1039/d3cc05558b

Enhanced protonation ability of covalent organic frameworks via N, O-bidentate chelation for photocatalytic H₂ evolution

Chem Commun (Camb). 2024 Feb 8;60(13):1782-1785. doi: 10.1039/d3cc05558b.

Authors

Xing Li¹, Huaji Pang^{2

3}, Yanqiu Zhu^{2

3}, Yonggang Xiang^{2

3}, Jianxiang Hu², Dekang Huang²

Affiliations

¹ Patent Examination Cooperation (Tianjin) Center of the Patent Office, Tianjin 300300, P. R. China.
² College of Chemistry, Huazhong Agricultural University, Wuhan 430070, P. R. China. hujianxinag@webmail.hzau.edu.cn.
³ College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, P. R. China.

PMID: 38252554
DOI: 10.1039/d3cc05558b

Abstract

Inspired by the bidentate coordination chemistry of metal ions, we incorporated hydroxyl (OH) and methoxy (OMe) groups into the skeleton of imine-linked COFs to improve their protonation ability via intramolecular hydrogen bonds (O-H⋯NC). In comparison with the pristine COFs possessing monodentate nitrogen coordination sites, OH and OMe functionalized COFs with (N,O)-bidentate chelating sites exhibited up to 13.8 times faster photocatalytic hydrogen evolution rates (HERs).