| abstract |
This invention provides imin complex dyes for a high-density optical disc recording medium having the following formula (I):wherein Y constitutes oxygen atom, sulfate atom, carbon atom with substitutes (C-R<5>) or nitrogen atom with substitutes (N-R<6>); R<1 >constitutes alkyl group having carbon number one to eighteen with or without substitutes or ether group, p-alkyl benzyl group with or without substitutes; R<2>, R<3>, R<5>, R<6>, R<7 >can be same or different groups; and X constitutes halogen atom, ClO4<->, BF4<->, PF6<->, SbF6<->, TCNQ<->, TCNE<->, naphthalenesulfonic acid or organometallic complex.x. The bis-styryl dyes whose spectra maximum absorption in visible light range of wavelength of 300 nm~800 nm can be used as a high density optical disc recording medium. |