Emission and surface properties of main-chain type polybenzoxazine with pyridinyl moieties

Abstract

A main-chain type polybenzoxazine, PBz (<bold>1</bold>), with pyridinyl moieties was prepared. When the THF dilute solution of PBz (<bold>1</bold>) was protonated with HCl, a new absorption signal at 458 nm was observed in the UV-vis spectrum. After being excited at 458 nm, a strong emission at 570 nm was observed in the fluorescence spectrum. This result suggests that the pyridinyl-containing PBz (<bold>1</bold>) can be used as a proton sensor.