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Some insights into the reactivity of oxovanadium phosphate: Synthesis and characterization of an VOPO4-H2N(CH2)3NH2 coordination compound

de Farias Robson F. (Programa de Pós-Graduação em Química, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte)
Airoldi Claudio (Instituto de Química, Universidade Estadual de Campinas, São Paulo, Brazil)

The lamellar matrix of VOPO4·2H2O was used as the host species to prepare a VOPO4-1,3-diaminopropane coordination compound. The oxovanadium matrix and the synthesized hybrid were characterized by elemental analysis, infared spectroscopy, thermogravimetry, X-ray diffractometry and SEM microscopy. The elemental analysis results, as well as the X-ray diffraction patterns and quantum chemical calculations, strongly suggest that the synthesized matrix is an equimolar (1:1) mixture of two compounds with the formulas VOPO4·[H 2N-(CH2)3-NH2] and VOPO4·[H2N-(CH2)3-NH2]0.5. The SEM micrographs obtained for the VOPO4- diaminopropane hybrid matrix show that the microstructure of VOPO4·2H2O is changed after reaction, with an overall exfoliation of the oxovanadium matrix.

Keywords: intercalation compounds, vanadium phosphate, nanostructure