Selective Photocatalysis Approach for Introducing ArS Units into BODIPYs through Thiyl Radicals.

Efficient and selective ArS substitution of BODPY by various thiophenols was developed, in which the BODIPYs catalyze the formation of the ArS radicals under light and trap them in situ to form C-S bonds. Interestingly, the fluorescence properties of the ArS-substituted BODIPYs are effectively modulated by the numbers and electronic effects of the ArS units, with quantum yields varying in a range of 0.001-0.87.