| abstract |
The present invention relates to a dye of formula (1).n n n Formula 1n n n n n n n n In Formula 1 above,n n n A 1 and A 2 are each independently of each other C (CH 3 ) 2 , O, S, Se, or CH═CH unsubstituted or substituted with C 1 -C 5 alkyl or benzyl,n n n M 1 and M 2 are each independently Cr 3+ or Co 3+ ,n n n L 1 and L 1 ′ are independently of each other 2 or Is a ligand of 3,n n n L 2 and L 2 ′ independently of one another and L 1 and L 1 ′ independently of formula 2, 3 or Is a ligand of 4,n n n m is a number from 0.2 to 1.0,n n n n is a number dependent on m, and is a number from 0.0 to 0.8 that causes the sum of m and n to be 1.0,n n n p and q are each independently 0 or 1,n n n Q is CR 15 , CR 15 -CR 16 = CR 17 or CR 15 -CR 16 = CR 17 -CR 18 = CR 19 . |