Synthesis, photophysics, and theoretical calculations of styryl-based fluorophores harboring substituted benzothiazole acceptors

This study describes the synthesis, photophysical characterization, and TD-DFT calculation of a series benzothiazole-based styryl fluorophores (F1-F5) harboring D-π-A structure. The compounds were obtained through simple efficient synthetic route using low-cost starting materials. investigation analysis their properties enable assessment effect four substituted benzothiazole moieties (A) two types π-conjugated frameworks (phenyl vs thienyl) in solution solid state. disclose absorption ultraviolet-blue region with moderate solvatochromic single emission band located at blue-green spectral range. In state, showed green-orange regions relatively large Stokes shift. systematic UV-Vis solvatochromism theoretical predictions CPCM model reveals increment dipole moment systems an excited state solvent dielectric constant. These high fluorescence quantum yield solid-state could be further exploited for lighting devices, or embedded design biological dyes.