Enhanced piezo-photocatalytic water splitting activity via engineering robust dipole moments in covalent organic frameworks.

ABSTRACT: Covalent organic frameworks with tunable optical bandgaps and notable piezoelectricity enable sustainable piezo-photocatalytic production of H₂ and H₂O₂ via pure water splitting. Strong dipole moments can significantly boost piezoelectric properties, necessitating a systematic exploration of their structure-property relationships. Here, we synthesize a series of β-ketoenamine/imine-linked covalent organic frameworks, such as TP-BT-0F/1F/2F-COF, BTA-BT-0F-COF, and TP-SB-COF, through molecular design engineering. The combination of symmetry-breaking benzothiadiazole units and in-plane polarized β-ketoenamine linkages creates a robust dipole moment in TP-BT-0F-COF. This material demonstrates a high piezoelectric coefficient and bandgap narrowing, achieving H

SUBMITTER: Liang ZZ 

PROVIDER: S-EPMC12819517 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature