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 subunits, [Zn(phen)2(H2O)2] [{Zn(phen)2}{Zn(phen)2(H2O)} {P2W18O62}]·8H2O (1) and [Cd(phen)2(H2O)2] [{Cd(phen)2}{Cd(phen)(H2O)3} {P2W18O62}]·4H2O (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 1D infinitely linear chains of polyanions polymerizing through the bridging coordination cation M(phen)22+ (M = Zn for 1, Cd for 2; phen = 1,10′-phenanthroline). The one-dimensional chains are assembled into three-dimensional networks by π ⋯ π stacking and hydrogen bonding interactions. Both (1) and (2) exhibit photoluminescence properties at room temperature.