励起状態分子内プロトン移動型発光体の液晶中での発光特性：発光量子収率向上への分子設計

抄録

One of the typical luminophores that exhibit fluorescence via excited-state intramolecular proton transfer (ESIPT) mechanism is 2-(2-hydroxyphenyl)benzothiazole (HBT) that shows efficient fluorescence in the solid state. However, HBT has a drawback of low fluorescence quantum yield (ΦFL) in solutions and LCs (e.g. 0.01 in CH2Cl2 and 0.07 in 5CB). Here we report that the introduction of a cyano group at 4-position of the hydroxyphenyl group serves as an effective strategy for the remarkable increase of ΦFL in solution and LCs (e.g. 0.49 in CH2Cl2 and 0.57 in 5CB).