Abstract: Nanometer particles have tremendous application potency in the fields of photoelectricity conversion, information storage and photocatalysis, etc.. However, it has not been reported that preparation of nanometer material was carried out from porphyrin compounds with a structure which can be modulated and have a higher chemical activity. At present, the preparation methods of nanometer material include liquid-phase method, gas-phase method and physical method. The liquid phase method also covers coprecipatation method and solvent evaporation method. The coprecipatation method has some drawback, for instancd, being difficult to wash and filtrate and easy to retain entrained precipitant. For gas phase method, solvent evaporation method and physical method, it needs special equipment and exacting technology conditions, as well as a high processing temperature which results in decomposition of most organic compounds, including porphyrin compounds.In this work, a new method was used to synthesize porphyrin nanometer material. By using this simple method, liquid molecules can be easily embedded in the pores of diatomaceous earth pores. The synthesized porphyrin nanometer material was characterized by the methods of UV-Vis, IR, surface photovoltage spectroscopy and transmission electron microscope. According to the photograph of transmission elecrton microscope, the diameter of crystalline grain of porphyrin molecules aggregated in the pores of diatomaceous earth pores estimated to be 20 nm.

Key words: Porphyrin, Nanometer material, Synthesis