mu-Oxo-bridged type aluminum and gallium phthalocyanine dimer - Synthesis,polymorphs and its primary evaluation as an electrophotographic receptor

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