| 摘要 |
A compound of the general formula: <CHEM> in which m + p = 2, preferably m = p = 1, n is 0 or 1, s is 0 or 1, Z<1> and Z<2> independently represent the non-metallic atoms necessary to complete a heterocyclic nucleus of the type present in cyanine dyes, R<1> and R<2> independently represent an alkyl, substituted alkyl, alkenyl, substituted alkenyl or aralkyl group of up to 20 carbon atoms. R<3> and R<4> independently represent a hydrogen atom or an alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkoxy or substituted alkoxy group of up to 10 carbon atoms R<5>, R<6>, R<7> and R<8>, which together may not contain more than 12 carbon atoms, independently represent a hydrogen atom, an alkyl, substituted alkyl, alkenyl, substituted alkenyl aryl or alkaryl group, and Y represents <CHEM> u |
