Direct Conversion from Carbon Dioxide to Luminescent Poly(β-alkoxyacrylate)s via Multicomponent Tandem Polymerization-Induced Emission

Using carbon dioxide (CO₂) as a feedstock to synthesize various polymers has drawn much attention. One-pot multicomponent tandem polymerization (MCTP) with great synthetic simplicity and efficiency is a powerful strategy for the synthesis of new CO₂-based luminescent polymers. In this work, we successfully developed a new one-pot MCTP combining three sequential carboxylation–cyclization–esterification reactions of CO₂, diynes, and alkyl dihalides to directly convert CO₂ into luminescent polymers with aggregation-enhanced emission (AEE) property. This MCTP could be facilely performed in N,N-dimethyl­acetamide in the presence of a cheap catalyst CuI and an organic base 7-methyl-1,5,7-triaza­bicyclo[4.4.0]­dec-5-ene under atmospheric pressure. A series of poly­(β-alkoxyacrylate)­s with well-defined structures and high molecular weights (M_w up to 15400) were obtained in high yields (up to 96%). The resultant polymers possess good thermal stability with high decomposition temperatures and high char yields. Because of polymerization-induced emission (PIE) effect, the nonluminescent monomers could be converted to luminescent poly­(β-alkoxyacrylate)­s with AEE features. Thus, this work provides a new pathway to directly transform CO₂ into luminescent polymers via a one-pot MCTP strategy.