The influence of alkyl lengths on circularly polarized luminescence for non-liquid crystalline binaphthol-based cyanostilbene.

In previous studies, the increasing alkyl length of liquid crystalline molecules enhanced the chiral transfer and resulted in better CPL performance. But no work concerned the influence of alkyl lengths on CPL properties for non-liquid crystalline systems. In this research, three R-binaphthol-based cyanostilbene derivatives with various alkyl chains (BC-5, BC-8 and BC-12) were prepared in yields of 60-69%.