Synthesis and characterization of a large Stokes-shifted fluorescent imide and its related polyimides bearing 2-(2′-hydroxyphenyl)benzothiazole moieties

A large Stokes-shifted fluorescent imide and its related polyimides were first designed and synthesized by introducing an excited state intramolecular proton transfer fluorophore 2-(2′-hydroxyphenyl)benzothiazole (HBT).