Full‐Color and White Circularly Polarized Luminescence Promoted by Liquid Crystal Self‐Assembly Containing Chiral Naphthalimide Dyes
Yang Li, Kun Yao, Yihan Chen, Yiwu Quan, Yixiang Cheng
Abstract
Abstract Chiral emissive nematic liquid crystals (N*‐LCs) can greatly amplify the circularly polarized luminescence (CPL) signals promoted by a highly regular spiral self‐assembly in the LCs system. Naphthalimide (NI) derivatives have been assigned to be one of the most excellent chromophores for fluorescent materials. In this paper, a novel strategy is first developed to regulate full‐color CPL behavior of N*‐LCs through different chiral NI‐based dyes. Chiral NI‐based dyes are doped into nematic liquid crystals (E7, N‐LCs) to form N*‐LCs as CPL‐active liquid crystal materials. Most interestingly, this kind of N*‐LCs could emit standard white CPL signals (CIE coordinates: (0.31, 0.33)) by choosing the blue‐red match of two chiral NI‐based dyes at the appropriate ratio.