题 目: Developing single ligand strategy for engineering a high-performance photocatalyst with the pore space partition and open-metal sites
作 者: Chen Si, Xueling Liu, Jiachen Jiao, Junjie Xu, Linghan Ye, Jie Li, Qiuxia Han*
刊 名: Applied Catalysis B: Environment and Energy
年卷页: Applied Catalysis B: Environment and Energy 362 (2025) 124687.
摘 要：Realizing the precise structure design and functional customization of photocatalysts is essential for achieving high conversion and selectivity. Herein, we propose an innovative pore space partition strategy for constructing a high-performance photocatalyst from a single ligand by regulating the group modification and symmetry of the ligand, which solves the problem of open-metal sites occupation. A novel polyoxometalate-based metal-organic framework, CoW-BTIz, was synthesized successfully from a new donor-acceptor-donor type photosensitizer 4,7-bis (imidazolyl) benzothiazole, Co cations and electron sponge [BW12O40] 5- anions. The push pull effect of the D-A-D units in the confined spatial ensures the charge rapid transport processes. Incorporating POM into photoactive MOF is beneficial to produce single •O2- via type I pathway primarily in air atmosphere by photo generated electron transfer. CoW-BTIz gave a high yield in the aerobic synthesis of 2-arylbenzothiazole and the cyclization of thioamide to 1,2, 4-thiadiazole by the synergetic effect of each component in mild conditions.
