We report a thermally cross-linkable fluorescent polymer and its assembly to insoluble microbeads by hydrothermal annealing. A novel fluorene-based poly(triarylamine) bearing crosslinkable styryl groups on a fluorene unit is newly designed and synthesized by a Pd-catalyzed amination reaction. The polymer self-assembles into spherical microparticles and becomes insoluble to organic solvents by hydrothermal crosslinking without losing the spherical morphology. Mixing of the polymer with polystyrene enhances the photoluminescence quantum yield by suppressing the aggregation induced quenching and induces a spectral shift of the emission band to green and red after annealing.
- Yuta Ihara
- Hiroshi Yamagishi
- Yohei Yamamoto
