Hydrogen-bond bridging dually facilitates exciton dissociation and charge migration for enhanced photocatalytic water oxidation.

ABSTRACT: As a kinetic bottleneck in artificial photosynthesis, the hole-mediated oxygen evolution reaction (OER) remains constrained by inefficient charge separation. We demonstrate here a hydrogen-bonded perylene diimide/aminated-fullerene (PDINH/C₆₀NH₃) supramolecular photocatalyst that concurrently enhances exciton dissociation efficiency (from 39.5% to 70.5%) and charge migration. The hydrogen bond between fullerene-tethered protonated amino and PDINH carbonyls creates a polarized bridge that enables exciton delocalization and conversion into weakly bound charge-transfer excitons, resulting in a significant decrease of exciton binding energy from 76.5 meV to 50.9 meV. Also, hydrogen-bond-induced charge polarization enhances the internal electric field by 3.5-fold, thereby

SUBMITTER: Jing J 

PROVIDER: S-EPMC12669891 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature