| 초록 |
Conventional conjugated polymers are generally stiff, rigid rod-like chain molecules with planar geometries and strong intermolecular interaction, which lead to highly dense cofacial chain packing structures, extremely low quantum efficiency, and stiffness in solid state. On the other hand, poly(diphenylacetylene) [PDPA] derivatives have weak intermolecular interaction and a nonplanar geometry due to highly twisted polymer chains, leading to an unstacked chain conformation and amorphous structure in bulk solid. In this study, we successfully created a high molecular weight PDPA derivative polymer with long alkyl chains at meta-position of side phenyl rings. The polymer exhibited high fluorescence quantum efficiency as well as a gum-like behavior in solid state due to the molten alkyl side chain at room temperature. The gum-like behavior of the polymer was due to not only the long alkyl side chains acting as plasticizer but also high rigidity of polymer backbone. |
