Free radical reaction of thiol-ene photo click reaction is not ideal click chemistry type, there is monomer homopolymerization and low monomer conversion existing, as well as uncontrollable, it is difficult to obtain the target product. In this paper, the phototriggered base proliferation and UV photopolymerization were introduced into thiol-ene reaction. We synthesized photobase generator 2-(2-nitrophenyl) propyl oxycarbonyl-hexylamine (NPPOC-HA) and amine amplifier. NPPOC-HA has UV absorption above 300 nm, and photolysis products are amine and styrene, no free radical produced. Next, we used phototriggered amine proliferation initiated via UV light to control the thiol-ene click reaction, reducing side effects. RTIR was adopted to monitor infrared absorption peaks change of –SH and –C=C, integrating peak area to verify the equal proportion reaction of thiol-ene. UV phototriggered base proliferation reaction, which integrated the safety and strong penetrating ability of UV photopolymerization as well as Domino free radical photopolymerization based on phototriggered base proliferation reaction, is expected to expand the application of thiol-ene Michael addition reaction.

Xiaoyuan Guan

Papers

Thiol-ene Michael Addition Reaction Under Phototriggered Base Proliferation