Hydrothermal synthesis and structure characterization of a new 3D vanadium hydrogen phosphite with 14-ring channels: (C5N2H14)[VO(H2O)]3(HPO3)4·H2O

A new 3D vanadium hydrogen phosphite, (C5N2H14)[VO(H2O)]3(HPO3)4·H2O, has been prepared by hydrothermal reactions and characterized by single crystal X-ray diffraction, infrared spectroscopy, thermogravimetric analysis, and magnetic techniques. It crystallizes in the triclinic space group P  -1 (no. 2) with a=6.258(1)Å, b=9.696(2)Å, c=19.384(4)Å, α=76.124(3)°α=76.124(3)°, β=83.726(4)oβ=83.726(4)o, γ=75.222(4)oγ=75.222(4)o, Z=2Z=2. The structure is built up from sharing equatorial oxygen atoms of VO5(H2O) octahedra with HPO3 tetrahedra, which can be viewed as a (3,4) connected net. The framework is mainly constructed by two types of four-ring related chains. Intrachain and interchain hydrogen bonds play an important role on supporting the framework structure. The 14-ring tunnels in the structure are filled with 1-methypiperazinium and water molecules, which also contribute the hydrogen bonding with the vanadium phosphite framework.

An organically templated vanadium phosphite is built up from sharing equatorial oxygen of VO5(H2O) octahedra with HPO3 tetrahedra containing 14-ring tunnels.Figure optionsDownload as PowerPoint slide