Synthesis and aggregation-induced emissions of thienyl substituted cyclobutene derivatives

摘要

Thienyl substituted cyclobutenes with aggregation induced emission behaviour have been synthesized for the first time in good selectivity, opening the possibility of cyclobutenes for application in light emitting diodes. Aggregation-caused quenching (ACQ), occurring when organic materials are highly fluorescent in their dilute solutions but become weakly fluorescent with the increase of solution concentration or aggregation in the solid state, is a notorious phenomenon in organic luminescent materials. Unfortunately, for practical applications, such as organic light emitting diodes (OLEDs), the solid state (powders, films or crystals) provides the best candidates for functional layers in electronic devices. So luminescent materials with aggregation-induced emission (AIE) properties have attracted much interest since the debut of the AIE concept in 2001.