Synthesis, Structure, and Photoluminescence Property of a Novel One-dimensional Inorganic-organic Hybrid Gallophosphate JGP-2

A novel one-dimensional inorganic-organic hybrid gallophosphate compound,Ga(2,2'-bipy)(HPO4)·(H2PO4)(denoted JGP-2) was synthesized hydrothermaily with 2,2'-bipyridine as a ligand and characterized by X-ray powder diffraction (XRD),elemental analysis,inductively coupled plasma(ICP),TGA analysis,solid-state 31p NMR,and luminescence spectra and structurally determined by single-crystal X-ray diffraction analysis.JGP-2 crystallized in the triclinic system,space group Pi(No.2),with a=0.7818(1) nm,b=0.8611(2) nm,c=1.0908(2) nm,V=0.6727(2)nm3 and Z=2 with R1=0.0223.The structure of JGP-2 was built up by alternate arrangement of GaO4N2 octahedra,and HPO4(or H2PO4) tetrahedra to form an infinite one-dimensional corner-sharing-corncr(CSC) chain.Through P sites,the CSC chains link with an unusual edge-sharing dimmer,Ga2F4(H2O)2,giving rise to a 4,10-membered ring net layered structure of JGP-7.On excitation at 254 nm,JGP-2 can emit strong blue light at λmax=388 nm.JGP-7 presents a strong fluorescence emission band centered at 394 nm(λex=340 nm),the emission energy of JGP-7 is red-shifted compared with that of JGP-2.