| abstract |
The present invention discloses a cyanine compound represented by the following general formula (I).n n n n n n n n In the formula, Ring A 1 represents a benzene ring or a naphthalene ring, Ring A 3 represents a 5-membered ring or a 6-membered ring. R 1 and R 2 each independently represent a hydrogen atom or the like. R 7 represents an alkyl group or the like. 12 represents a substituent represented by the following general formula (II) or (II ′), R 20 represents a hydrogen atom, etc. An q − is a q-valent anion, q is 1 or 2, and p is a coefficient for maintaining charge neutral. Indicates.)n n n n n n n n In formula (II), the bond between L and T is a double bond, a conjugated double bond or a triple bond, L is a carbon atom, T is a carbon atom, an oxygen atom, a sulfur atom or a nitrogen atom, x, y and z Is 0 or 1, s is a number from 0 to 4, R 13 is a hydrogen atom and the like, and R 14 , R 15 and R 16 each independently represent a hydrogen atom, etc. In General Formula (II ′), L ′ And a bond between T 'is a double bond or a conjugated double bond, L' is a carbon atom, T 'is a carbon atom, an oxygen atom or a nitrogen atom, s' is a number from 0 to 4, and L 'and T' The ring represents a 5-membered ring etc. which may contain a hetero atom.) |