| abstract |
A cyanine compound represented by the following general formula (I):n nwherein the ring A 1 represents benzene or naphthalene ring; the ring A 3 represents 5-membered or 6-membered ring; R 1 and R 2 each independently represent a hydrogen atom and the like; R 7 represents an alkyl group and the like; R 12 represents a substituent represented by the following general formula (II) or (II'); R 20 represents a hydrogen atom and the like; An q- represents a q-valent anion; q represents 1 or 2; p represents a coefficient to keep the charge neutral:n nwherein, in the general formula (II), the bond between L and T is a double, conjugated double, or triple bond; L represents a carbon atom; T represents a carbon, oxygen, sulfur, or nitrogen atom; x, y, and z represent 0 or 1; s represents a number from 0 to 4; R 13 represents a hydrogen atom and the like; R 14 , R 15 , and R 16 each independently represent a hydrogen atom and the like; in the general formula (II'), the bond between L' and T' is a double or conjugated double bond; L' represents a carbon atom; T' represents a carbon, oxygen, or nitrogen atom; s' represents a number from 0 to 4; the ring containing L' and T' represents 5-membered ring and the like which may contain a heteroatom. |