Design and synthesis of conjugated polymers of tunable pore size distribution

Abstract

Conjugated microporous polymers of tunable pore size distribution were synthesized by Yamamoto homo-coupling or co-coupling of 1,3,5-tris(4-bromophenyl)benzene with five chaining monomers of different strut length, respectively. Conjugated microporous polymers with apparent BET surface area in the range from 172 to 820 m2 g−1 were prepared. The materials were found to have excellent microporosity, which could be accurately tuned by changing the strut length of chaining monomers. It was revealed that copolymerization of the core monomer and several chaining monomers with different strut length was an effective strategy to fine-tuning properties of the materials. Moreover, the incorporation of “flexible” double bonds into the chaining monomers could further promote this strategy. H2 and CO2 adsorption capacity of conjugated microporous polymers were also systematically investigated.