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Temperature- and pressure-induced switching of the molecular spin state of an orthorhombic iron(III) spin-crossover salt

Tissot, A., Shepherd, H.J., Toupet, L., Collet, E., Sainton, J., Molnár, G., Guionneau, P., Boillot, M.-L. (2013) Temperature- and pressure-induced switching of the molecular spin state of an orthorhombic iron(III) spin-crossover salt. European Journal of Inorganic Chemistry, (5-6). pp. 1001-1008. ISSN 14341948 (ISSN). E-ISSN 1099-0682. (doi:10.1002/ejic.201201059) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:50820)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
https://doi.org/10.1002/ejic.201201059

Abstract

The [(TPA)FeIII(TCC)]+ complex [TPA = tris(2-pyridylmethyl) amine, TCC2- = 3,4,5,6-tetrachlorocatecholate dianion] forms a molecular solid with the SbF6 - anion, which exhibits an incomplete S = 1/2 â?? S = 5/2 thermal spin-crossover process centered at 250 K. Single-crystal X-ray diffraction, Raman spectroscopy, and magnetic measurements of this orthorhombic polymorph were performed to delineate the spinstate thermo- and piezoswitching in relation to the structural and elastic properties. Indeed, a pressure-induced spin cross- over (centered at P1/2 â?? 1.65 kbar, T = 294 K) concomitant with unit-cell contraction was observed by applying a hydrostatic pressure to the single crystal. Under ambient conditions, the piezo-induced transition, like that induced thermally, is relatively gradual, which probably reflects a similar mechanism in response to both stimuli. Except for a 47 K shift, the spin-crossover curves of the isostructural SbF6 - and PF6 - salts compare well. They are discussed with respect to structural anisotropy and pressure effects. © 2013 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Item Type: Article
DOI/Identification number: 10.1002/ejic.201201059
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Eur. J. Inorg. Chem. [Field not mapped to EPrints] AD - ICMMO, Univ. Paris-Sud 11, UMR CNRS 8182, 91405 Orsay Cedex, France [Field not mapped to EPrints] AD - LCC, UPR CNRS 8241, 31077 Toulouse Cedex 04, France [Field not mapped to EPrints] AD - Institut de Physique de Rennes, UMR 6251 UR1-CNRS Bat 11A Campus de Beaulieu, University Rennes 1, 35042 Rennes Cedex, France [Field not mapped to EPrints] AD - CNRS, Univ. Bordeaux, ICMCB, UPR 9048, 33608 Pessac, France [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: Iron, Raman spectroscopy, Spin crossover, X-ray diffraction
Subjects: Q Science > QD Chemistry > QD473 Physical properties in relation to structure
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 22 Oct 2015 08:08 UTC
Last Modified: 23 Jan 2020 04:10 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50820 (The current URI for this page, for reference purposes)
Shepherd, H.J.: https://orcid.org/0000-0003-0832-4475
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