Hydrothermal synthesis and characterization of a novel 3D open framework structure of mixed valence ethylenediamine-vanadium phosphate: [C2H10N2]-[((HVO3)-O-IV)((HVO2)-O-V)(PO4)]

摘要

A new three-dimensional open framework structure of mixed valence ethylenediamine-vanadium phosphate [C2H10N2][(HVIV-O-3)((HVO2)-O-V)(PO4)] (1), has been synthesized under mild hydrothermal conditions and characterized by elemental analyses, IR, fluorescent spectrum, TG-DTA and single crystal X-ray diffraction. Compound 1 exhibits a novel three-dimensional (3D) vanadium phosphate anion framework composed of vanadium, phosphate, and oxygen atoms through covalent bonds, with the diprotonated ethylenediamine [NH3CH2CH2NH3](2+) cations residing in the channels along c-axis. The organic diprotonated ethylenediamine cations interact with the O atoms in the inorganic network through hydrogen bonds. The electrochemical behavior of 1 has also been studied in detail by cyclic voltammograms, which is very important for practical applications in electrode modification. Furthermore, the strong photoluminescence property of compound 1 is also measured at room temperature. (c) 2006 Elsevier B.V. All rights reserved.