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High pressure effects on a trimetallic Mn(II/III) SMM

DOI: 10.1039/b908718d DOI Help

Authors: Alessandro Prescimone (School of Chemistry, The University of Edinburgh, U.K.) , Javier Sanchez-benitez (School of Engineering and Centre for Science at Extreme Conditions, The University of Edinburgh, U.K.) , Konstantin V. Kamenev (School of Engineering and Centre for Science at Extreme Conditions, The University of Edinburgh, U.K.) , Stephen Moggach (The University of Edinburgh) , Alistair Lennie (Diamond Light Source) , J Warren (STFC Daresbury Laboratory, U.K) , Mark Murrie (WestCHEM, Department of Chemistry, University of Glasgow, U.K.) , Simon Parsons (School of Chemistry, The University of Edinburgh, U.K.) , Euan K. Brechin (School of Chemistry, The University of Edinburgh, U.K)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Dalton Transactions , PAGES 7390-7395

State: Published (Approved)
Published: January 2009

Abstract: A combined study of the high pressure crystallography and high pressure magnetism of the complex [Mn(3)(Hcht)(2)(bpy)(4)](ClO(4))(3)center dot Et(2)O center dot 2MeCN (1 center dot Et(2)O center dot 2MeCN) (H(3)cht is cis, cis-1,3,5-cyclohexanetriol) is presented in an attempt to observe and correlate pressure induced changes in its structural and physical properties. At 0.16 GPa the complex 1 center dot Et(2)O center dot MeCN loses all associated solvent in the crystal lattice, becoming 1. At higher pressures structural distortions occur changing the distances between the metal centres and the bridging oxygen atoms making the magnetic exchange between the manganese ions weaker. No significant variations are observed in the Jahn-Teller axis of the only Mn(III) present in the structure. High pressure dc chi(M)T plots display a gradual decrease in both the low temperature value and slope. Simulations show a decrease in J with increasing pressure although the ground state is preserved. Magnetisation data do not show any change in vertical bar D vertical bar.

Journal Keywords: High Pressure Crystallography; High Pressure Magnetism; Trimetallic Mnii/Iii Smm

Subject Areas: Chemistry

Facility: Daresbury Laboratory

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