Hydrothermal synthesis, crystal structure and properties of a 3D-framework polyoxometalate assembly: [Ag(4,4′-bipy)](OH){[Ag(4,4′-bipy)]2[PAgW12O40]}·3.5H2O

A 3D framework assembly based on the Keggin tungstophosphate POM with silver (I) transition metal and N-ligand organic moiety and of formula [Ag(4,4′-bipy)](OH){[Ag(4,4′-bipy)]2[PAgW12O40]}·3.5H2O (1) (bipy=bipyridine) has been synthesized by hydrothermal method and structurally characterized. The crystal of 1 belongs to triclinic, space group P  -1, Mr=3857.27Mr=3857.27, a=10.2741(3)Å, b=11.3723(4)Å, c=14.0161(5)Å, α=85.7249(5)°α=85.7249(5)°, β=72.8795(5)°β=72.8795(5)°, γ=79.9543(5)°γ=79.9543(5)°, V=1540.61(9)Å3, Z=1Z=1, Dcalc=4.158Mgm-3. The final statistics based on F2 are GOF=1.045, R1=0.0326R1=0.0326 and wR2=0.0843wR2=0.0843 for I>2σ(I)I>2σ(I). X-ray diffraction analysis revealed that the molecular structure of 1 consists of a neutral fragment {[AgI(4,4′-bipy)]2[PAgIWVI12O40]}, [AgI(4,4′-bipy)]+ cation, hydroxide anion and lattice water molecules. The {[AgI(4,4′-bipy)]2[PAgIWVI12O40]} subunits are interconnected through Ag(I) with bipyridine ligands, both surface bridging and terminal oxygen atoms of polyoxoanions (POMs) to represent a novel three-dimensional (3D) polymer with 1D elliptic channels. Meanwhile, the [AgI(4,4′-bipy)]+ cations are also linked each other to form 1D chains, and embedded in 1D elliptic channels.

A 3D framework assembly based on the Keggin tungstophosphate polyoxoanion (POM) with silver (I) transition metal and N-ligand organic moiety and of formula [Ag(4,4′-bipy)](OH){[Ag(4,4′-bipy)]2[PAgW12O40]}·3.5H2O (1) (bipy=bipyridine) has been synthesized by hydrothermal method and structurally characterized. The molecular structure of 1 consists of a neutral fragment {[AgI(4,4′-bipy)]2[PAgIWVI12O40]}, [AgI(4,4′-bipy)]+ cation, oxyhydrogen anion and lattice water molecules. The {[AgI(4,4′-bipy)]2[PAgIWVI12O40]} subunits are interconnected through Ag(I) with bipyridine ligands, both surface bridging and terminal oxygen atoms of POMs to represent a novel 3D polymer with 1D elliptic channels. Meanwhile, the [AgI(4,4′-bipy)]+ cations are also linked each other to form 1D chains, and embedded in 1D elliptic channels.Figure optionsDownload as PowerPoint slide