Synthesis, crystal structure, vibrational spectra and thermal properties of novel ionic organic-inorganic hybrid material

Abstract A novel and simple approach to the synthesis of a new organic-inorganic 4C 3 H 5 N 3 O 3 2+ ·2C 3 H 4 N 3 O 3 + ·5HPO 4 2− ·4H 2 O resulted from the reaction of melamine and phosphoric acid in methanol. It was identified by means of the single crystal X-ray diffraction and characterized using different physicochemical studies to gain deeper insight in its structure. The determination of the crystal structure showed that the compound crystallizes in monoclinic system with the space group P 2 1 , lattice parameters a  = 11.3061 A, b  = 20.9911)A, c  = 12.2711 A. The UV–Vis shows a good transmittance in the visible range, with an absorption threshold at 255 nm. The thermal behavior divulges a good thermal stability up to 230 °C.