Aggregation‐Induced Circularly Polarized Luminescence from Boron Complexes with a Carbazolyl Schiff Base
Chihiro Maeda, Shuichi Nomoto, Kazuto Takaishi, Tadashi Ema
Abstract
Abstract A variety of carbazolyl‐appended Schiff bases were readily synthesized from 1‐formylcarbazoles and aniline derivatives. Boron complexation of the resulting ligands allowed for facile preparation of new carbazole‐based BODIPY analogues showing solid‐state fluorescence. Furthermore, some dyes were converted into chiral compounds through the Et 2 AlCl‐mediated incorporation of a binaphthyl unit. The chiral dyes showed aggregation‐induced fluorescence and circularly polarized luminescence (CPL) with the Φ F and g lum of up to 0.22 and −3.5×10 −3 , respectively, in the solid state. The solid‐state fluorescence and CPL were well characterized by the crystal packing analyses and DFT calculations.