Formation of Organic Pigment Films by Photochemical Reduction of Surfactants Containing an Azobenzene Group

A copper phthalocyanine 1 thin film and photoimage were formed on a polyester film by irradiation of an aqueous dispersion containing a surfactant with an azobenzene group 2a, dispersed 1, hydroquinone 3 and 0.1 M HCl. A spectroscopic study showed that the photochemical reduction of 2a with 3 leads to the deposition of 1.