Phthalocyanine crystal, and electrophotographic photoreceptor, electrophotographic photoreceptor cartridge and image-forming device using the same

A phthalocyanine composition, comprising:

• phthalocyanine, and
• an organic compound,
• wherein the phthalocyanine composition is obtained by a process comprising bringing a low-crystalline or amorphous phthalocyanine comprising oxytitanium phthalocyanine into contact with the organic compound in the presence of an aromatic compound, thereby converting a crystal form of the phthalocyanine;
• wherein the organic compound is in a liquid state at a pressure of 1013 hPa and a temperature of 25° C. and does not have a functional group showing acidity;
• wherein the aromatic compound is solid at a pressure of 1013 hPa and a temperature of 25° C. and has an electron-withdrawing substituent;
• wherein the low-crystalline or amorphous phthalocyanine is obtained by a chemical treatment process;
• and
• wherein the phthalocyanine composition has a combination of definite peaks at Bragg angle (2θ±0.2°) toward CuKα characteristic X-ray of wavelength 1.541 angstroms:
• (i) 9.6°, 24.1°, 27.2°,
• (ii) 9.5°, 9.7°, 24.1°, 27.2°, or
• (iii) 9.0°, 14.2°, 23.9°, 27.1°.

A phthalocyanine crystal obtained by contacting a low-crystalline phthalocyanine and/or amorphous phthalocyanine comprising oxytitanium phthalocyanine with an aromatic compound that does not have a functional group showing acidity and at least one organic compound selected from the group consisting of an organic acid, an organic acid anhydride, and an organic acid ester having a heteroatom, to convert the low-crystalline phthalocyanine and/or the amorphous phthalocyanine to the phthalocyanine crystal;

• wherein the phthalocyanine crystal has a main diffraction peak at Bragg angle (2θ±0.2°) toward CuKα characteristic X-ray of wavelength of 1.541 angstroms of 27.1°-27.2°, no definite peak at 26.2°, and a combination of definite peaks:
• (i) 9.6°, 24.1°, 27.2°,
• (ii) 9.5°, 9.7°, 24.1°, 27.2°, or
• (iii) 9.0°, 14.2°, 23.9°, 27.1°.