[Cs6 Cl][Fe24 Se26 ]: A Host-Guest Compound with Unique Fe-Se Topology
| Autor: | Claudia Felser, Chang Yang Kuo, Bodo Böhme, Liu Hao Tjeng, Walter Schnelle, Martin Valldor, Horst Borrmann, Yurii Prots, Yves Watier, Zhiwei Hu, Peter Adler, Tun Wen Pi |
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| Rok vydání: | 2016 |
| Předmět: |
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Molecular Cesium 02 engineering and technology Spin structure Crystallography X-Ray Topology 01 natural sciences Catalysis chemistry.chemical_compound Chlorides 0103 physical sciences Mössbauer spectroscopy Organometallic Compounds Antiferromagnetism Ferrous Compounds 010306 general physics Hyperfine structure Topology (chemistry) Group 2 organometallic chemistry Chemistry Spectrum Analysis Organic Chemistry General Chemistry 021001 nanoscience & nanotechnology Crystallography Cubane X-ray crystallography 0210 nano-technology |
| Zdroj: | Chemistry - A European Journal. 22:4626-4631 |
| ISSN: | 0947-6539 |
| Popis: | The novel host-guest compound [Cs6Cl][Fe24Se26] (I4/mmm; a=11.0991(9), c=22.143(2) Å) was obtained by reacting Cs2Se,CsCl, Fe, and Se in closed ampoules. This is the first member of a family of compounds with unique Fe-Se topology, which consists of edge-sharing, extended fused cubane [Fe8Se6Se8/3] blocks that host a guest complex ion, [Cs6Cl](5+). Thus Fe is tetrahedrally coordinated and divalent with strong exchange couplings, which results in an ordered antiferromagnetic state below TN =221 K. At low temperatures, a distribution of hyperfine fields in the Mössbauer spectra suggests a structural distortion or a complex spin structure. With its strong Fe-Se covalency, the compound is close to electronic itinerancy and is, therefore, prone to exhibit tunable properties. |
| Databáze: | OpenAIRE |
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