Synthesis and properties of a new vanadium benzene‐1,3‐diphosphonate

The use of the linker molecule benzene-1,3-diphosphonic acid (H4L) and V4+-ions in a hydrothermal synthesis without further additives led to the discovery of a new coordination polymer of composition [(VO)2(H2O)4(L)] ⋅ 2H2O. The structure of the compound was solved by direct methods from powder X-ray diffraction data and refined using the Rietveld method. The compound was thoroughly characterized showing a reversible amorphization upon reduced pressure or high temperatures. A potential porosity was calculated, but could not be verified by H2O-adsorption experiments.

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