Electron donating group stimulated aggregation induced emission enhancement of oligophenylenevinylene-cored luminogens

Abstract

Three new oligophenylenevinylene (OligoPV)-cored luminogens were synthesized by utilizing the Suzuki coupling/Buchwald–Hartwig amination reaction and their aggregation-induced emission properties have been studied. Out of three, two are aggregation-induced emission enhancement (AIEE)-active molecules: weakly fluorescent in solution, while highly emissive in the aggregation state. The presence of the OligoPV core has turned an aggregation-caused quenching (ACQ) luminophore into an AIEE one. They show excellent solubility in common organic solvents, emit light in the green region (500–516 nm) and have high thermal stability.