An unexpected dual-emissive luminogen with tunable aggregation-induced emission and enhanced chiroptical property
Xinyu Zhang, Huiqing Liu, Guilin Zhuang, Shangfeng Yang & Pingwu Du
In the literature, organic materials with both aggregation-induced emission (AIE) and aggregation-caused quenching (ACQ) effects that can emit with multiple bands both in the solution and aggregated state are rarely reported. Herein we report a novel chiral dual-emissive bismacrocycle with tunable aggregation-induced emission colors. A facile four-step synthesis strategy is developed to construct this rigid bismacrocycle, (1,4)cycloparaphenylenophane (SCPP), which possesses a 1,2,4,5-tetraphenylbenzene core locked by two intersecting polyphenylene-based macrocycles. The luminescent behavior of SCPP shows the unique characteristics of both ACQ effect and AIE effect, inducing remarkable redshift emission with near white-light emission. SCPP is configurationally stable and possesses a novel shape-persistent bismacrocycle scaffold with a high strain energy. In addition, SCPP displays enhanced circularly polarized luminescence properties due to AIE effect.
aggregation, emission, CPL, CD, AIE