Disclosed are a phthalocyanine near infrared absorbing material having a phthalocyanine skeleton whose benzene rings contain a silyl group as a bulky substituent and an optical information recording medium containing the material. The phthalocyanine near infrared absorbing material has excellent association-preventing property and light resistance and exhibits a high index of refraction at a wave length of 770-830 nm and high stability, an optical information recording medium (CD-R recording medium) containing the phthalocyanine has high reflectance, excellent storage stability and excellent reproduction stability. The recording medium also shows strong light absorptivity and light reflectivity in a wave length of 630-700 nm and, thus, is applicable for the pick up with a semiconductor laser of 630-700 nm, permitting such high density recording as to provide 1.6-1.7 times as high recording density as that attained by currently employed recording media which are adapted to 780-810 nm.
本发明揭示了一种
酞菁类近红外吸收材料,其
酞菁骨架的苯环含有
硅烷基作为笨重的取代基,并且还揭示了一种含有该材料的光学信息记录介质。该
酞菁类近红外吸收材料具有优异的防聚集性和耐光性,并在770-830纳米波长处表现出高折射率和高稳定性。含有该
酞菁类的光学信息记录介质(CD-R记录介质)具有高反射率、优异的存储稳定性和再现稳定性。该记录介质还在630-700纳米波长处表现出强的光吸收性和光反射性,因此适用于半导体激光器在630-700纳米之间的拾取,可以实现比目前适用于780-810纳米的记录介质更高1.6-1.7倍的高密度记录。