申请人:Mitsui Chemicals, Inc.
公开号:EP1900779A1
公开(公告)日:2008-03-19
Disclosed is a trimethine dimer compound represented by the following general formula (I) and optical recording medium containing such a compound in a recording layer.
(I)(In the formula, symbols are as in the description. When both Xa2 and Xb2 are imino groups, one of Xa1, Xb1, Xa3 and Xb3 is necessarily a 1-alkyl-1-benzylmethylene group which may have a substituent, a 1,1-dibenzylmethylene group which may have a substituent or a cycloalkane-1,1-diyl group having 3 to 6 carbon atoms which may have a substituent.)
揭示了由以下一般式(I)表示的三亚甲基二聚物化合物,以及包含这种化合物在记录层中的光学记录介质。(I)(在该式中,符号如描述中所示。当Xa2和Xb2均为亚胺基时,Xa1、Xb1、Xa3和Xb3中的一个必定是1-烷基-1-苄基亚甲基基团,可能具有取代基,可能具有取代基的1,1-二苄基亚甲基基团或可能具有取代基的含有3至6个碳原子的环烷烃-1,1-二基基团。)