μ-Oxo-bridged Type Aluminum and Gallium Phthalocyanine Dimer --Synthesis, Polymorphs and Its Primary Evaluation as an Electrophotographic Receptor--

Yasuhiro YAMASAKI*, Kenji TAKAKI and Kazuyoshi KURODA

3rd R & D Center, R & D Department, Orient Chemical Industries, Ltd.; Sanrahigashi-Machi, Neyagawa-shi572-8581Japan

We already found and reported that the specific polymorphs of μ-oxo-aluminum phthalocyanine dimer and μ-oxo-gallium phthalocyanine dimer have fairly good characteristics as the electrophotographic receptor. In connection with our ongoing works on this field, we are interested in the synthesis of μ-oxo-bridged dimers of diverse metal phthalocyanines for persuing various charge generating materials in electrophotographic receptors. We report here the results of studies on the polymorphs of the titled phthalocyanine dimer, i.e. μ-oxo-bridged between aluminum and gallium phthalocyanine dimer, and their primary electrophotographic evaluation.

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