Methods for preparing cocrystals of titanyl fluorophthalocyanines and unsubstituted titanyl phthalocyanine, electrophotographic elements, and titanyl phthalocyanine compositions

A composition of matter comprising cocrystals including unsubstituted titanyl phthalocyanine and titanyl fluorophthalocyanine having the general structure:

• ##STR4## where each of k, l, m, and n is independently an integer from 0 to 4 and at least one of k, l, m, and n is an integer from 1 to 4;
• said cocrystals exhibiting an x-ray diffraction spectrum differing tom the x-ray diffraction spectrum of a physical mixture of first crystals consisting essentially of said unsubstituted titanyl phthalocyanine and second crysts consisting essentially of said titanyl fluorophthalocyanine, wherein said cocrystal composition has a first intensity peak at 7.4.degree..+-.0.2.degree. with respect to X-rays characteristic of Cu K.alpha. at a wavelength of 1.541 .ANG. of the Bragg angle 2.theta. at and a second intensity peak at 28.6.degree..+-.0.2.degree..

An electrophotographic element comprising an electrically conductive layer and a photogenerating layer overlaying said electrically conductive layer, said photogenerating layer including the composition of matter comprising cocrystals including unsubstituted titanyl phthalocyanine and titanyl fluorophthalocyanine having the general structure:

• ##STR5## where each of k, l, m, and n is independently an integer from 0 to 4 and at least one of k, l, m, and n is an integer from 1 to 4;
• said cocrystals exhibiting an x-ray diffraction spectrum differing from the x-ray diffraction spectrum of a physical mixture of first crystals consisting essentially of said unsubstituted titanyl phthalocyanine and second crystals consisting essentially of said titanyl fluorophthalocyanine, wherein said cocrystal composition has a first intensity peak at 7.4.degree..+-.0.2.degree. with respect to X-rays characteristic of Cu K.alpha. at a wavelength of 1.541 .ANG. of the Bragg angle 2.theta. at and a second intensity peak at 28.6.degree..+-.0.2.degree..