One-step synthesis of Fe-phthalocyanine/Fe3O4 hybrid microspheres

Fe-phthalocyanine/Fe3O4 hybrid microspheres were synthesized from bis-phthalonitrile and FeCl3.6H(2)O through a simple and effective solvent-thermal route. The hybrids were monodispersed solid microspheres with diameter of similar to 400 nm. The ferromagnetic signature emerged with the saturated magnetization of similar to 55.7 emu g(-1), and the coercive force of similar to 93.7 Oe at 300k. The addition of bis-phthalonitrile oligomer brought Fe3O4 nanoparticles novel dielectric property: a new dielectric loss peak appeared at similar to 8 GHz. Considering the microwave magnetic loss properties, two microwave magnetic loss peaks were presented at similar to 1.5 GHz and similar to 10 GHz, the former peak was attributed to the natural properties of the Fe3O4, and the latter originated from the interface effects between the bis-phthalonitrile oligomer and Fe3O4. (C) 2010 Elsevier B.V. All rights reserved.