Full‐Color and White Circularly Polarized Luminescence Promoted by Liquid Crystal Self‐Assembly Containing Chiral Naphthalimide Dyes

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.