Metal phthalocyanine derivative and its use

摘要

A metal phthalocyanine derivative represented by the following general formula (1): <CHEM> wherein R1 and R2 independently represent a hydrogen atom, a C1-18 alkyl group, a C1-18 alkenyl group, a cyclohexyl group, a phenyl group or an allyl group (provided that R1 and R2 are not hydrogen atoms at the same time), M represents Cu, Ni or Co and n represents 1,2,3 or 4.