Green phthalocyanine compound and preparation method thereof

Abstract

The invention discloses a green phthalocyanine compound having a structure represented by a formula (I). The structure of the precursor of the green phthalocyanine compound is represented by a formula(II). Under the protection of nitrogen, the precursor represented by the formula (II), metal salts, and a solvent are added into a dry reaction bottle, the dry reaction bottle is vacuumized, then nitrogen is filled into the dry reaction bottle; under the protection of nitrogen, a catalyst is added, and the reaction bottle is heated to a temperature of 100 to 190 DEG C to carry out reactions for 1to 20 hours under the protection of nitrogen to prepare the phthalocyanine compound represented by the formula (I). During the synthesis process, no halogenation reaction is needed, thus the safety of the synthesis process is high, and the environmental load is low. Moreover, the solubility of the green phthalocyanine compound is high, can be used as a novel soluble dye, and is capable of being dissolved in a molecule form. The technical process is largely simplified. At the same time, the dye can be made into a uniform solution, the light scattering caused by insoluble pigment particles is avoided, and high resolution and high contrast are realized.

Description

technical field [0001] The invention belongs to the technical field of organic synthetic dyes, in particular to a green phthalocyanine compound and a preparation method thereof. Background technique [0002] Since Swiss chemist Professor H.Diesbach and others discovered phthalocyanine compounds in 1927, in 1978, researchers at the University of Tokyo in Japan successfully photographed the world's first photo of copper chloride phthalocyanine using a 500-kilovolt electron microscope with ultra-high resolution capabilities. A photo of the atomic structure of a cyanine molecule. Over the past 60 years, phthalocyanine chemistry has made great progress, and various dyes and compounds based on phthalocyanine have also made great progress. Phthalocyanine compounds have bright color and excellent fastness. In addition to acid dyes and disperse dyes, there are other dyes based on phthalocyanine. In recent years, the use of phthalocyanine's high thermal stability and good light fastn...

AI Technical Summary

Problems solved by technology

[0003] At this stage, a large amount of halogen and aluminum chloride are used in the production process of phthalocyanine pigments such as Pigment Green 58 (P.G.58), which has high potential safety hazards and causes a great load on the environment

Second, most phthalocyanine compounds are insoluble in organic solvents, and the pigments exist in the form of small particles, which usually suffer from insufficient dispersion, which in turn leads to insufficient brightness and contrast

[0004] The patent with the publication number WO2016015208A1 discloses a class of phenoxy-substituted green phthalocyanine derivatives, which have good solubility and have the advantages of high contrast and good stability when applied in the liquid crystal field, but are not suitable for large-scale industrial applications

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