Synthesis and structural characterization of (H4APPIP)[V3(C2O4)2(HPO4)3(PO4)(H2O)]·6H2O (APPIP=1,4-bis(3-aminopropyl)piperazine), a layered vanadium oxalatophosphate containing double 6-ring units |
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Authors: | Ming-Feng Tang |
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Institution: | a Department of Chemistry, National Central University, Chungli, Taipei 320, Taiwan, ROCb Institute of Chemistry, Academia Sinica, Nankang, Taipei 320, Taiwan, ROC |
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Abstract: | A new vanadium(III) oxalatophosphate has been synthesized hydrothermally and characterized by single-crystal X-ray diffraction and thermogravimetric analysis. It crystallizes in the triclinic space group with a=11.604(2) Å, b=12.391(2) Å, c=15.220(3) Å, α=71.090(3)°, β=82.630(3)°, γ=62.979(3)°, V=1843.8(5) Å3 and Z=2. The structure consists of V6(HPO4)6 double 6-ring (D6R) units connected by coordinating C2O42− and PO43− anions to form anionic sheets in the ab plane with charge-compensating quadruply protonated 1,4-bis(3-aminopropyl)piperazinium cations and water molecules between the sheets. It is one of the few compounds with 2D layer structures and the second example containing D6R units in the system of metal oxalatophosphates. The iron analogue was also synthesized. |
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Keywords: | Vanadium Phosphate Oxalate Structure |
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