[HN(CH2CH2)3NH]3[Fe8 (HPO4)12(PO4)2(H 2O)6]: an organically templated iron phosphate with a pillared layer structure
- 1 January 1997
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 13,p. 2221-2226
- https://doi.org/10.1039/a700472i
Abstract
An organically templated iron phosphate, [HN(CH 2 CH 2 ) 3 NH] 3 [Fe 8 (HPO 4 ) 12 (PO 4 ) 2 (H 2 O) 6 ], has been synthesized under solvothermal conditions and characterized by single-crystal X-ray diffraction, Mössbauer spectroscopy and thermogravimetric analysis. The compound crystallizes in the trigonal space group Pc1 (no. 165) with a = 13.5274(5), c = 19.2645(6) Å, U = 3052.9(3) Å 3 and Z = 2. The structure consists of layers of corner-sharing FeO 6 and FeO 5 (OH 2 ) octahedra and PO 4 and PO 3 (OH) tetrahedra which are pillared through additional FeO 6 octahedra to form a three-dimensional framework structure. The framework contains a two-dimensional array of intersecting channels in which the charge compensating diprotonated 1,4-diazabicyclo[2.2.2]octane cations reside. The framework is closely related to that of an imidazole encapsulating indium phosphate, [H 3 O][C 3 N 2 H 5 ] 3 [In 8 (HPO 4 ) 14 (H 2 O) 6 ]·5H 2 O.Keywords
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