Syntheses and Photonic Properties of Copolymers Containing Indolocarbazole Moiety in the Side Chain

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In this study, the synthesis of an indolo[3,2-b]carbazole (INC) derivative containing an octyl group and a p-vinylbenzyl group at N-positions was carried out as a monomer compound to obtain copolymers with methyl methacrylate (MMA) by a radical polymerization. These copolymers showed the amorphous state and exhibited the higher thermal stability as INC content increased, which maintained the high emission property of INC moiety. Furthermore, the spin-coating and casting films could be prepared form the copolymer solutions. Then, it was found that the strong photoluminescence was observed for these polymer films, the INC content of which was ca. 5 mol%.