α-Cyanostilbene-modified 1,8-naphthalimide dye with long wavelength emission: synthesis, characterization, self-absorption + ESIPT, and controllable and reversible solid fluorescence

A novel α-cyanostilbene-modified 1,8-naphthalimide dye exhibiting self-absorption + ESIPT characteristics in the solution state and controllable and reversible solid fluorescence has been described.