| 摘要 |
The cyanine compound of the present invention is represented by general formula (I) below and shows decomposition behavior suitable as an optical recording material used for an optical recording layer of an optical recording medium for high-speed recording:
(wherein in formula, ring A and ring B each represent an optionally substituted benzene or naphthalene ring; X represents O, S, Se, CR 3 R 4 , or NY; at least one of R 1 and R 2 represents a group represented by general formula (II) or (III) and when only one of them is a group represented by general formula (II) or (III), the other represents an organic group having 1 to 30 carbon atoms; R 3 and R 4 each represents an organic group having 1 to 30 carbon atoms; Y represents a hydrogen atom or an organic group having 1 to 30 carbon atoms; at least one of Y 1 and Y 2 is a group represented by general formula (IV) and when only one of Y 1 and Y 2 is a group represented by general formula (IV), the other represents a hydrogen atom or an organic group having 1 to 30 carbon atoms; Z represents a hydrogen atom, a halogen atom, or a cyano group; An m- represents an m-valent anion; m is an integer of 1 or 2; and p represents a coefficient to keep an electric charge neutral). |
