Synthesis and fluorescence mechanism investigation on two novel benzidine AIE compounds

Two novel fluorescent compounds TTPA and TBPH were synthesized by Suzuki coupling reaction. The fluorescence intensity of TTPA and TBPH increased with the increasing of aggregation degree. Fluorescence test and theoretical calculation confirmed that these two compounds have typical aggregation-induced luminescence (AIE) effect and the formation of ICT phenomenon. The AIE effect was studied by the perspective of photophysical behavior. By reducing the temperature and increasing the solvent viscosity, the rotation of the rotor was limited, the non-radiation energy consumption was reduced and the fluorescence intensity was improved.