Hybrid pyrazoline-triazole fluorescent dyes: Synthesis, photophysics, electrochemical, and antioxidative activity

•A new series of fluorescent dyes of 1,2,3-triazole tail hybrid system is studied.•Compounds exhibit photophysical properties in solution and in the solid-state.•Fluorescence quantum yields and Stokes Shifts depend on the solvent polarity.•Time-resolved fluorescence shows variation according to the solvent polarity.•New possible fluorescent probes for small amounts of acid or protic species.