Hydrothermal synthesis of the first iron arsenate-oxalate [C 4N 2H 12] 2[Fe 4(HAsO 4) 6( C 2O 4) 2], possessing open architecture
Abstract
The hydrothermal synthesis and structural characterization of the first iron arsenate-oxalate [C 4N 2H 12] 2[Fe 4(HAsO 4) 6(C 2O 4) 2], I, with open-framework structure has been described. Crystal data for I: triclinic, space group P(-1) (no. 2), a=11.1066(2), b=12.9842(1), c=13.4294(1) Å, α=111.345(1), β=93.688(1), γ=93.879(1)°, V=1706.33(4) Å 3, Z=2, ρcalc=2.755 g cm -3, μ ( Mo K α) =7.567 mm -1, R1=0.0441 and wR2=0.113 for 3861 reflections with I>2 σ( I). The framework structure of I consists of neutral inorganic sheets formed by the linkages between strictly alternating FeO 6 octahedra and AsO 4 tetrahedra cross-linked by the oxalate units forming an anionic three-dimensional network with channels. The charge compensating doubly protonated piperazine molecules occupy these channels and interact with the framework through strong hydrogen bonds. The compound shows strong anti-ferromagnetic interactions with TN∼40 K.
- Publication:
-
Solid State Sciences
- Pub Date:
- March 2002
- DOI:
- 10.1016/S1293-2558(02)01268-2
- Bibcode:
- 2002SSSci...4..405C