Titanyl phthalocyanine, method for production thereof and electrophotographic photoreceptor containing the same

Abstract

A peroxide-modified titanyl phthalocyanine for use in preparing charge generating layer of a photoreceptor is disclosed. The peroxide-modified titanyl phthalocyanine is obtained by subjecting titanyl phthalocyanine to a peroxide-induced complexation-mediated crystal transformation at a low temperature. The peroxide-modified titanyl phthalocyanine is characterized by having Bragg diffraction angles of 7.3, 9.4, 14.0, 24.1, 25.7, 27.2 and 28.5 degrees, and vibrational absorption resonances at 1486 cm (superscript: −1), 1420 cm (superscript: −1), 1134 cm (superscript: −1), 1078 cm (superscript: −1), 966 cm (superscript: −1), 900 cm (superscript: −1), 762 cm (superscript: −1) and 736 cm (superscript: −1). The photoreceptor exhibits excellent photosensitivity at wavelengths in the near-infrared range and has a unique crystal form, especially the peroxide-modified titanyl phthalocyanine shows a higher distinct absorption peak at the wavelength of 780 nm.

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