Synthesis and structural characterization of two polymorphs of Fe(2,2'-bpy)(HPO{sub 4})(H{sub 2}PO{sub 4})
- Department of Chemistry, National Central University, Chungli, Taiwan 320 (China)
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan 300 (China)
- Department of Chemistry, National Central University, Chungli, Taiwan 320 (China) and Institute of Chemistry, Academia Sinica, Taipei, Taiwan 115 (China)
Two polymorphs of an organic-inorganic hybrid compound, Fe(2,2'-bpy)(HPO{sub 4})(H{sub 2}PO{sub 4}) (1 and 2) (2,2'-bpy=2,2'-bipyridine), have been synthesized by hydrothermal methods and structurally characterized by single-crystal X-ray diffraction, thermogravimetric analysis, and magnetic susceptibility. Crystal data are as follows: Polymorph 1, monoclinic, space group P2{sub 1}/n (No. 14), a=10.904(2)A, b=6.423(1)A, c=19.314(3)A, {beta}=101.161(3){sup o}, and Z=4; Polymorph 2, monoclinic, space group P2{sub 1}/c (No. 14), a=11.014(1)A, b=15.872(2)A, c=8.444(1)A, {beta}=109.085(3){sup o}, and Z=4. Polymorph 1 adopts a chain structure in which each iron atom is coordinated by two nitrogen atoms from 2,2'-bpy ligand and four phosphate oxygen atoms. These infinite chains are extended into a 3-D supramolecular array via {pi}-{pi} stacking interactions of the lateral 2,2'-bpy ligands. The structure of polymorph 2 consists of the same building units, namely FeO{sub 4}N{sub 2} octahedron, HPO{sub 4} and H{sub 2}PO{sub 4} tetrahedra, and 2,2'-bpy ligand, which are linked through their vertices forming an undulated sheetlike structure with 4,12 network. Adjacent layers are extended into a 3-D array via {pi}-{pi} stacking interactions of the aromatic groups. Magnetic susceptibility measurement results confirm that the iron atoms in both compounds are present in the +3 oxidation state.
- OSTI ID:
- 20900848
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 10; Other Information: DOI: 10.1016/j.jssc.2006.05.035; PII: S0022-4596(06)00323-9; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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