Dielectric properties of copper phthalocyanine nanocomposites incorporated with graphene oxide

Graphene/phthalocyanine derivatives were successfully prepared by self-assembling of phthalocyanine on graphene sheets under solvothermal condition. The results of Ultraviolet Visible (UV–Vis), X-ray photoelectron spectroscopy, scanning electron microscope and electrical measure suggested that the competition between metal–ligand coordination and π–π interaction between graphene and phthalocyanine endowed composites with conspicuous evolutions in self-assembly behavior, morphology and dielectric properties. Importantly, the effective restoration of π-electron within the graphene played a dominant role in enhancing the dielectric properties of the system while the formation of metal–ligand coordination bond between graphene oxide and copper phthalocyanine hindered the improvement of dielectric properties.