Synthesis and structure determination of a new organically templated scandium fluorophosphate framework and its indium analogue

Hyunsoo Park, Ivor Bull, Luming Peng, Victor G. Young, Clare P. Grey, John B. Parise

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29 Scopus citations

Abstract

Two new isostructural scandium and indium phosphate frameworks, (C 6H14N2)M4F2(PO 4)4· 4H2O (M = Sc, In), have been synthesized from hydrothermal conditions using an organic amine, 1,4-diazabicyclo[2.2.2]octane (DABCO), as a template. Their structures have been determined by single-crystal X-ray diffraction and supported by solid-state magic-angle spinning (MAS) NMR spectroscopy. They crystallize in the P2 1/n space group with a = 10.283(2) Å, b = 12.698(2) Å, c = 17.864(3) Å, and β = 102.761(3)° and a = 10.280(2) Å, b = 12.700(2) Å, c = 17.860(4) Å, and β = 102.47(3)° for Sc- and In-compounds, respectively. They are built from corner-sharing M octahedra and P tetrahedra which form eight- and six-membered channels along the b-axis. The channels are occupied by organic templates and water molecules. All PO 4 groups share four corners with M polyhedra, resulting in a fully connected framework. The local environments around P, F, and Sc atoms in the Sc-compound were carefully examined by 31P MAS, 19F MAS, 45Sc MAS, 45Sc MQMAS, and 45Sc/19F REDOR NMR spectroscopy.

Original languageEnglish (US)
Pages (from-to)5350-5356
Number of pages7
JournalChemistry of Materials
Volume16
Issue number25
DOIs
StatePublished - Dec 14 2004

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