CPL-tunable BN-embedded supramolecular macrocycles†

Abstract

Circularly polarized luminescence (CPL) active materials, especially pure organic small molecules, have emerged as a subject of considerable interest because of their unique property of emitting circularly polarized light directly without optical grating and easy adjustability. The formation of supramolecular macrocycles represents an effective approach for enhancing the CPL signal of pure organic small molecules. In this study, BINOL-phosphoric acid was initially employed to construct supramolecular macrocycles, while the boron-nitrogen (BN) embedded structure was responsible for improving light stability and PLQY. This article presents a novel design of CPL-active small organic molecules that exhibit both a high g_lum value and high PLQY. Additionally, these molecules demonstrate a significant response to changes in their environment, resulting in pronounced variations in CPL properties.