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Synthesis and Characterization of (C4H12N2)2[Fe6(HPO4)2(PO4)6(H2O)2]·H2O, a New Iron Phosphate Templated by Piperazine

✍ Scribed by Vı́tězslav Zima; Kwang-Hwa Lii

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 730 KB
Volume: 139
Category: Article
ISSN: 0022-4596
DOI: 10.1006/jssc.1998.7851

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✦ Synopsis

An organically templated iron phosphate, (C 4 H 12 N 2 ) 2 [Fe 6 (HPO 4 ) 2 (PO 4 ) 6 (H 2 O) 2 ] • H 2 O, has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction, thermogravimetric analysis, and Mo¨ssbauer spectroscopy. The compound crystallizes in the triclinic space group P1 (No. 2) with a ‫؍‬ 9.1768(1), b ‫؍‬ 12.7229(1), c ‫؍‬ 16.4830(2) A s , ‫؍‬ 68.530(1), ‫؍‬ 83.285(1), ‫؍‬ 73.259(1)°, V ‫؍‬ 1714.90

(3) A s 3 , and Z ‫؍‬ 2. The structure consists of layers of FeO 6 octahedra and phosphate tetrahedra, which are pillared through FeO 5 trigonal bipyramids and phosphate tetrahedra to form a three-dimensional framework structure. The framework contains infinite channels in which the charge compensating diprotonated piperazinium cations reside.

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