| abstract |
A dye compound represented by the following formula has at least one anionic group: n n n n n n n n n n wherein R 1 and R 2 independently represent an amino or hydroxyl group, A 1 represents nitrogen or CR 4 , R 4 and R 3 form a first aromatic ring, R 3 represents a substituent with a negative Hammett's substituent constant when A 1 represents nitrogen, and Cy represents a second aromatic ring. |