| 摘要 |
PURPOSE:To enhance sensitivity and reflectivity in a near infrared region and provide durability, by providing a recording layer comprising a specified phthalocyanine compound on a base. CONSTITUTION:On a base provided is a recording layer which comprises as a main constituent a phthalocyanine compound of the formula, namely, a phthalocyanine compound in which each of peripheral carbon atoms at specified positions of phthalocyanine is linked to one member selected from a specified group, while each of the other peripheral carbon atoms is linked to one member selected from another specified group, the number of the former peripheral carbon atoms thus linked being 2-8 and the number of the latter peripheral carbon atoms thus linked being 3-8. In the formula, numerals 1-16 denotes positions of the peripheral carbon atoms, K denotes substituent groups which may be the same or different, each of s, t, p and q is an integer of 0-4, each of the groups K corresponding to at least two of the peripheral carbon atoms at the positions 1, 4, 5, 8, 9, 12, 13 and 16 is a linked group P, which is -NH2, -NO2, -CN, -SO3Y, -SO1X or -X, and each of 3-8 carbon atoms of the peripheral carbon atoms at the positions 1-16 is a group (Z)rR, wherein Y is hydrogen or a metal atom, X is halogen, Z is -CH2, -CONHor -COO-, and R is a 4H-18C straight chain or branched alkyl or aryl; M is a metal, a metallic oxide or a halide of hydrogen and a metal; and r is 0 or 1. |
