A conjugated microporous polymer PPTA bearing 2,6-bis(1,2,3-triazol-4-yl)pyridine (btp) units has been developed from tris(4-azidophenyl)amine and 2,4,6-triethynylpyridine by using a click reaction. PPTA is permanently porous and has a strong ability to absorb visible light. Owing to the exceptional coordination capability of btp, PPTA can interact with Pd2+, Cu2+, or Ni2+ to form polymer–metal complexes. The metalated polymer exhibited excellent catalytic activity in the one-pot construction of disulfide and thioether groups via a dual photoredox metal catalysis. Using this method, a variety of 2-phenylthiophene disulfides were effectively prepared from phenylthiols. Additionally, this heterogeneous catalytic system demonstrates exceptional durability and can be retrieved and reused without any reduction in its catalytic activity.
Pan et al. (Thu,) studied this question.