Rational Design of Circularly Polarized Luminescent Aggregation-Induced Emission Luminogens (AIEgens): Promoting the Dissymmetry Factor and Emission Efficiency Synchronously
Yue Wu, You Li, Zhen‐Qiang Yu, Jiahui Wang, Zhengong Meng, Yi Liu, Xin‐Shun Li, Kuo Fu, Xiang‐Kui Ren, Ben Zhong Tang
Abstract
Development of circularly polarized luminescent (CPL) materials with strong emission and high dissymmetry factor of luminescence (glum) is highly desirable. A series of CPL-active aggregation-induced emission luminogens (AIEgens) have been successfully constructed by incorporating AIEgen dicyanodistyrylbenzene (DCS) into chiral molecule cholesterol. Benefiting from its typical AIE characteristic, DCS allows emission efficiency up to 73.7% in a condensed state. Furthermore, cholesterol units ensure forming chiral liquid crystal in syntax, and increasing the glum value of CPL from 7 × 10–4 for the amorphous state to 1.1 × 10–1 for the liquid crystal state. This approach paves a general avenue for addressing the major defect well: high glum always suffers from suppression of emission efficiency.