A novel pored supramolecular compound (C4H6N3)2·(P2Mo18O62)·(C4H7N3)2·(H2O)4: synthesis, crystal structure and photochromic property

A novel organic–inorganic supramolecular compound (C4H6N3)2·(P2Mo18O62)·(C4H7N3)2·(H2O)4 was synthesized through hydrothermal methods and characterized by IR spectroscopy, UV–Vis, Fluorescence spectra, TG-DTA, single-crystal X-ray diffraction. The results indicate that the compound exhibit a two-dimensional supramolecular network via hydrogen bond interactions. Crystal data: orthorhombic, Pnma space group, a = 25.4728 (17) Å, b = 20.3269 (8) Å, c = 15.6810 (7) Å, V = 8119.4 (7) Å3, Z = 4, R1 = 0.1285, wR2 = 0.2214. There is a pore structure between six [P2Mo18O62]6− along the b-axis. The accessible volume is 17.9% as estimated using the SOLV function of PLATON. The color of this compound is gradually turned from yellow into green in the ultraviolet irradiation with UV lamp (8W, 253 nm) for 2 h. It is indicated that the compound has photochromic property.