A dye-liquid crystal organic compound and its application in the preparation of dichroic dyes and dimming elements.

Abstract

This invention discloses a dye-based liquid crystal organic compound and its applications. The dye-based liquid crystal organic compound has the structure shown in Formula I, wherein R1 and R2, when appearing in each instance, represent the same or different C1-C15 straight-chain, branched alkyl, or alkoxy groups. Any one or more unconnected -CH2- groups can be replaced by cyclopropylene, cyclobutylene, cyclopentylene, or cyclopentene, -CH=CH-, -N(Re)-, -O-, -S-, -CO-, -CO-O-, or -O-CO- in a form where O- or S- groups are not connected to each other. Furthermore, at least one -CH2- group in R1 and R2 is replaced by cyclopropylene, cyclobutylene, cyclopentylene, or cyclopentenylene. This dye-based liquid crystal organic compound structure features a low melting point, good low-temperature solubility, and a small contrast ratio between room temperature and high temperature. It can be uniformly mixed and completely dissolved with mixed crystals at relatively low processing temperatures, reducing the risk of thermal decomposition or phase transition in liquid crystal materials.

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