Projects per year
Abstract
A combination of high-pressure single crystal X-ray diffraction and high-pressure SQUID magnetometry has been used to study two oxo-bridged mixed-valent Mn-III/Mn-IV dimers. [Mn2O2(bpy)(4)](ClO4)(3)center dot 3CH(3)CN, (1.3CH(3)CN; bpy = 2,2'-bipyridine) has been compressed to 2.0 GPa whilst [Mn2O2(bpy)(4)](PF6)(3)center dot 2CH(3)CN center dot 1H(2)O, (2.2CH(3)CN center dot 1H(2)O) could be measured crystallographically up to 4.55 GPa. The PF6 salt of [Mn2O2(bpy)(4)](3+) has never been reported before while 1 has been reported as a hydrate and in a different crystallographic space group. The application of hydrostatic pressure imposes significant distortions and modifications in the structures of both complexes. In particular, in complex 1.3CH(3)CN the Mn-Mn separation is reduced by the contraction of some of the Mn-O bond lengths, whilst in 2.2CH(3)CN center dot 1H(2)O the Mn-O Mn bridging angles and the Mn-O bond lengths are substantially unchanged. Interestingly 2.2CH(3)CN center dot 1H(2)O also shows a constant contraction in nearly all the Mn-N bonds. The magnetic behaviour of the complexes has been measured up to 0.87 GPa for 1.3CH(3)CN and 0.84 GPa for 2.2CH(3)CN center dot 1H(2)O.
Original language | English |
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Pages (from-to) | 221-230 |
Number of pages | 10 |
Journal | Zeitschrift für Naturforschung B |
Volume | 65 |
Issue number | 3 |
Publication status | Published - Mar 2010 |
Keywords / Materials (for Non-textual outputs)
- High Pressure
- Coordination Chemistry
- Clusters
- X-Ray Crystallography
- SQUID Magnetometry
- X-RAY-DIFFRACTION
- INELASTIC NEUTRON-SCATTERING
- TRANSITION-METAL-COMPLEXES
- DIAMOND-ANVIL CELL
- CRYSTAL-STRUCTURES
- MAGNETOSTRUCTURAL CORRELATIONS
- MANGANESE COMPLEXES
- MAGNETIC-PROPERTIES
- LOW-TEMPERATURE
- ANISOTROPY
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Dive into the research topics of 'High-Pressure Study of Oxo-bridged Mixed-Valent Mn-III/Mn-IV Dimers'. Together they form a unique fingerprint.Projects
- 3 Finished
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EPR characterization of molecular magneto-structural correlations under pressure
Brechin, E. (Principal Investigator), Kamenev, K. (Co-investigator) & Parsons, S. (Co-investigator)
1/10/09 → 31/12/12
Project: Research
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A new SQUID magnetometer for extreme conditions research
Kamenev, K. (Principal Investigator), Attfield, P. (Co-investigator), Bos, J.-W. (Co-investigator), Brechin, E. (Co-investigator), Harrison, A. (Co-investigator) & Huxley, A. (Co-investigator)
1/09/07 → 31/01/11
Project: Research
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Effect of High Pressure on Single Molecule Magnets
Kamenev, K. (Principal Investigator), Allan, D. (Co-investigator), Brechin, E. (Co-investigator), Harrison, A. (Co-investigator) & Parsons, S. (Co-investigator)
1/01/06 → 30/04/09
Project: Research