Synthesis and Properties of Organic-Inorganic Hybrid Light Emitting Materials Using Phenothiazine-Based Polymers

In this study, we synthesized phenothiazine-based polymers having polar functional group at the chain ends. We then carried out hybridization of the obtained polymers with silica. The weight average molecular weight (M-w) of the obtained polymers were 4000 similar to 5700. Thus, there were soluble in organic solvents such as chloroform and THF. The polymers were thermally stable and showed a 10% thermogravimetric loss around 280 degrees C. Fluorescence spectrum of poly[10-(2-ethylhexyl)phenothiazinyl-alt-phenylene] (P1) in THF showed peaks at 490 nm an 520nm, supporting light blue emission. In addition, a similar emission was confirmed from solid-state P1. In the case of a P1/SiO2 hybrid, the peak of photoluminescence was observed at 480 nm to emit blue light. Thermal stability and weather ability of the P1/SiO2 were also investigated.