Two novel hybrid inorganic-organic compounds based on Wells-Dawson polyanion and transition metal (TM) complex with one-dimensional structure: Hydrothermal synthesis and characterization

Two new inorganic-organic hybrid materials constructed from Wells-Dawson polyanion clusters and secondary-metal complex sub-units, [Zn(phen)(2)(H2O)(2)][{Zn(phen)(2)}{Zn(phen)(2)(H2O)} {P2W18O62}]center dot 8H(2)O (1) and [Cd(phen)(2)(H2O)(2)][{Cd(phen)(2)}{Cd(phen)(H2O)(3)} {P2W18O62}]center dot 4H(2)O (2), have been prepared under hydrothermal conditions and characterized by single-crystal X-ray diffraction, elemental analysis, IR, thermogravimetric analysis, and photoluminescence spectrum. Single-crystal X-ray diffractions reveal that both the compounds exhibit I D infinitely linear chains of polyanions polymerizing through the bridging coordination cation M(phen)(2)(2+) (M = Zn for 1, Cd for 2; phen = 1,10'-phenanthroline). The one-dimensional chains are assembled into three-dimensional networks by pi...pi stacking and hydrogen bonding interactions. Both (1) and (2) exhibit photoluminescence properties at room temperature. (c) 2006 Elsevier B.V. All rights reserved.