Hydrothermal Synthesis And Research Of New Indium Phosphate (Indium Phosphite)

Inorganic microporous materials have popular application in catalysis, adsorption, ion-exchange, separation and host-guest assemblies due to their unique pore architectures. And the rational design and synthesis of new microporous compounds, as well as the development of new synthetic ways are becoming the topics of microporous chemistry. In the last decade, the synthesis of new materials that might combine the nanoporosity of zeolites with the magnetic and optical properties, electronic conductivity and ferrodlectricity of transition metal phosphates such as TiPOs, VPOs, FePOs, ZnPOs and CoPOs have been reported in the literature. Many of these materials exhibit unique structures and may have potential applications in catalysis and magnetic field. In addition to phosphates, open framework metal arsenates, phosphite, selenite, germinates, sulfates and carbonate have also been reported in the literature. The successful syntheses of these new compounds with open-framework open a new field for the microporous compounds. This research focused on the hydrothermal synthesis and structural characterization of gallium phosphates (gallium phosphite) templated by organic amine. Two new three-dimensional fluoroindium phosphates, In4(PO4)4(H2O)4F2·C6H14N2 1 and In8(PO4)8(H2O)8F4·(C5H14N2)2 2, have been prepared under hydrothermal conditions by using triethylenediamine and 1-methylpiperazine as templates, respectively. They are characterized by powder X-ray diffraction, inductively coupled plasma analysis, elemental analysis, fluoride ion-selective electrode, IR spectra and thermogravimetric analysis. The structures have been solved by single-crystal X-ray diffraction. Both the compounds crystallize in the monoclinic system, space group P21/n (No.14). Crystal data for 1, M = 1063.42, a = 10.3161(4) ?, b = 12.7490(3) ?, c = 17.9127(6) ?, β= 102.476(2)°, V = 2300.25(13) ?3, Z = 4. Crystal data for 2, M = 2102.80, a = 18.4673(6) ?, b = 12.7117(5) ?, c = 20.4705(7) ?, β= 108.566(2)°, V = 4555.4(3) ?3, Z = 4. They exhibit the same inorganic topological structure and are built up from vertex linking InO4(H2O)2, InO4FH2O and InO4F2 octahedral and PO4 tetrahedral units, forming 6-membered ring channels along the a direction and two types of 8-membered ring channels along the b direction. The diprontonated triethylenediamine and 1-methylpiperazine molecules are entrapped in 8-membered ring channels. A novel indium phosphite, In2(HPO3)3(H2O) was hydrothermally prepared and characterized by single-crystal X-ray diffraction. Crystal data: formula In2(HPO3)3(H2O), Fw= 487.59, Monoclinic, space group P21, a = 6.6255(13) ?, b = 10.203(2) ?, c = 7.5208 ?, Z = 2, V = 479.29(5) ?3. The structure of the compound consists of In2O10 dimer and pseudo pyramidal HPO3, which are connected by sharing vertexes to form the 3D inorganic framework with a In/P ratio of 2/3. In2(HPO3)3(H2O) is the first indium phosphite synthesized by hydrothermal...