ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Апрель 25, 2025

Photosensitization by photoactive materials requires well-designed molecular engineering to enable continuous photochemical processes. However, developing a heavy-atom-free (HAF) strategy enhance the photoactivity of photosensitizers remains significant challenge. In this study, we introduce novel photosensitization incorporating benzophenone-rich components into 3D polymers (BQP1 and BQP2) 2D covalent organic framework (BQ-TMT COF). This incorporation accelerates both charge carrier separation intersystem crossing, thereby significantly improving photo-to-chemical energy conversion electron transfer reactions. Notably, crystalline BQ-TMT COF enables efficient photocatalytic O2 activation, producing 1O2 O2·- with high efficiency recyclability. It demonstrates selective oxidation in 1O2-mediated sulfide transformations. Moreover, material performs well O2·--mediated oxidation, including hydroxylation boronic acids amines imines. The COF-based photoelectrode generates photocurrent approximately 20.7 μA·cm-2 at 0.4 V vs RHE achieves hydrogen production rate. Our study HAF heterogeneous photosensitizer small molecule activation through engineering.

Язык: Английский