Anodic Chlorination of Selenophene-Containing Polymers: Reaction Efficiency and Selective Reaction of Single Segment in Rod-Rod Diblockcopolymer

摘要

The post-polymerization modification of selenophene-containing (co) polymers is presented based on the electrochemical polymer reaction (ECPR). Selenophene-or thiophene-containing (co) polymers, which are known to be promising materials in optoelectronic devices, were synthesized through Kumada catalyst transfer polymerization to give their homopolymers and block-or statistical copolymers with various side chains. Each of the series of polymers was subjected to post-modification through the ECPR, and the reaction efficiencies were systematically compared. Selenophene-containing polymers were successfully modified with better ECPR reaction efficiencies than their thiophene analogues. Moreover, the dramatic inhibiting effect of a branched side chain on the ECPR was observed and rationalized, which was very unexpected. Based on the basic tendency observed here, we have finally demonstrated the selective modification of a single segment of a rod-rod block copolymer for the first time.