Patent ID: 7799910

Claim:
A compound selected from the group consisting of: (a) compounds of the formula A-L-D, wherein A is a 1,9-bis(thio)dipyrrin, L is p-phenylene or a covalent bond, and D is a 1,9-diacyldipyrromethane; and (b) compounds of the formula A′-L-B, wherein A is a 1,9-bis(thio)dipyrromethane, L is p-phenylene or a covalent bond, and B is a dipyrromethane-1,9-dicarbinol; and (c) compounds of the formula C-L-D, wherein C is a dipyrromethane, L is p-phenylene or a covalent bond, and D is a 1,9-diacyldipyrromethane.