Patent ID: 7939656

Claim:
A method for the synthesis of a porphyrin rod, comprising the steps of: (a) providing a compound of the formula A-L-D, wherein A is a 1,9-bis(thio)dipyrrin, L is a linker group or covalent bond, and D is a 1,9-diacyldipyrromethane; (b) reducing said compound of formula A-L-D to produce a compound of the formula A′-L-B, wherein A is a 1,9-bis(thio)dipyrromethane, L is said linker group or covalent bond, and B is a dipyrromethane-1,9-dicarbinol; (c) desulfurizing and reducing said compound of formula A-L-D to produce a compound of the formula C-L-D; wherein C is a dipyrromethane, L is said linker group or covalent bond, and D is a 1,9-diacyldipyrromethane; (d) condensing said compound of formula A′-L-B with said compound of formula C-L-D to produce an elongated compound of formula A-L-D, wherein A is a 1,9-bis(thio)dipyrrin, L is a linker group, and D is a 1,9-diacyldipyrromethane, with said linker group comprising 2 n −1 porphyrinic macrocycles, wherein n is from 1 to 10; and then (e) optionally repeating steps (b) through (d) for 2 to 10 additional cycles to produce a further elongated compound of formula A-L-D.