PHTHALOCYANINE NEAR INFRARED PIGMENT, THIN FILM, AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a phthalocyanine near infrared pigment that can be readily purified only by heating a commercially available, inexpensive chemical mixture under suitable conditions with low production cost and can readily form thin film because having high solubility in common solvents.;SOLUTION: This invention is a near infrared complex pigment that is composed of a cation represented by the formula (wherein Rs are one or more substituents linking to individual benzene rings and may be identical to or different from each other and are selected from hydrocarbon groups and hetero-atom-including substituted hydrocarbon groups) and of a counter anion.;COPYRIGHT: (C)2004,JPO&NCIPI