[Synthesis, structure and surface photovoltage spectrum of coordination supramolecule: [Cu(phen) (H2O)2. SO4]]

A novel transition metal coordination supramolecule [Cu(phen) (H2O)2.SO4] has been synthesized by hydrothermally method. The single crystal structure was determined by X-ray diffraction, and the complex was characterized by IR and UV-Vis-NIR spectra. The structure analysis indicates that there are a lot of hydrogen bonds in the crystal, which make the complex form a 1D double chain coordination supramolecule. Surface photovoltage spectroscopy (SPS) technique was applied to detect surface electron behavior and study the photoelectric conversion capability of the complexes. SPS is a useful tool for surveying the charge change of solid material surface. Its sensitivity comes to 10(8) q x cm(-2), which exceeds that of conventional spectroscopy such as XPS and Auger spectroscopy by many orders of magnitude. But long time, the study of SPS has mainly focused on inorganic semiconductor and organic semiconductor. There are seldom reports about the coordination polymers and supramolecules. The results of surface photovoltage spectrum (SPS) indicate that the complex exhibit positive surface photovoltage responses in the range of 300-800 nm. The induced surface photovoltage spectrum (FISPS) proved that the complex possesses the characteristic of p-type semiconductor.