One inorganic–organic hybrid derived from reduced molybdophosphate and trinuclear cadmium(II) fragment

One new polyoxometalate (POM)-based inorganic–organic hybrid [CdII3(HPO4)(Hbpp)(H2O)2]{CdII[P4Mo6O28H3.5(OH)3]2}·(H4tpb)·7H2O (1) (bpp = 1,3-bis-(4-pyridyl)propane, tpb = 1,2,4,5-tetra(4-pyridyl)-benzene) constructed from reduced molybdophosphate [P4Mo6O28H3.5(OH)3]5.5− (P4Mo6), trinuclear CdII-phosphate-Hbpp fragment and protonated tpb has been hydrothermally synthesized and structurally characterized by IR, elemental analyses and single crystal X-ray diffraction. The complex 1 crystallizes in the monoclinic system with the space group P21/c and cell parameters of a = 15.672(12) Å, b = 23.839(19) Å, c = 27.654(2) Å, β = 115.850(10)°, V = 9297.9(12) Å3, Z = 4, R1 = 0.0534 and wR2 = 0.1135. In complex 1, the P4Mo6 units are bridged by CdII ions to form the classic sandwich-type [Cd(P4Mo6)2] dimers, which are further connected into a two dimensional network via the trinuclear CdII subunits. The tpb is synthesized in situ from the bpp ligands and connects the adjacent 2D layers into a 3D supramolecular framework through hydrogen bonding interactions. The electrochemical and fluorescent properties of complex 1 have been investigated.

A two dimensional (2D) inorganic–organic hybrid based on reduced sandwich-type [Cd(P4Mo6)2] dimers and trinuclear cadmium(II) fragments is obtained. 1,2,4,5-Tetra(4-pyridyl)-benzene (tpb) is synthesized in situ from the 1,3-bis-(4-pyridyl)propane (bpp) ligands, which connects the adjacent 2D layers into a 3D supramolecular framework through hydrogen bonding interactions. The electrochemical and fluorescent properties of complex 1 have been investigated.Figure optionsDownload as PowerPoint slide