High-Performance Polyquinolines with Pendent High-Temperature Chromophores for Second-Order Nonlinear Optics

A series of high-temperature and chemically stable chromophores were covalently attached onto the polyquinoline backbones. These NLO side-chain polyquinolines possess high glass transition temperature (Tg > 200 °C), excellent processibility, thermal stability, and electrooptical properties. Poling results of these polymers demonstrate large electrooptic coefficient (r33) values (up to 17 pm/V measured at 0.83 μm) and good temporal alignment stability of polymer films (the r33 value retained more than 80% of the original value at 100 °C for more than 3000 hours).