[Cs6 Cl][Fe24 Se26 ]: A Host-Guest Compound with Unique Fe-Se Topology.

Autor: Valldor M; Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany. martin.valldor@cpfs.mpg.de., Böhme B; Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany., Prots Y; Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany., Borrmann H; Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany., Adler P; Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany., Schnelle W; Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany., Watier Y; ESRF, 71 Avenue des Martyrs, 38000, Grenoble, France., Kuo CY; Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany., Pi TW; National Synchrotron Radiation Research Centre, Hsinchu, 30076, Taiwan., Hu Z; Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany., Felser C; Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany., Tjeng LH; Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2016 Mar 18; Vol. 22 (13), pp. 4626-31. Date of Electronic Publication: 2016 Feb 16.
DOI: 10.1002/chem.201504840
Abstrakt: 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.
(© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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