 |
 |
Institut de Chimie de la Matière Condensée de Bordeaux |  |
 |
|
|
Institut de Chimie de la Matière Condensée de Bordeaux | |
|
| HAL : hal-00682930, version 1 |
| PubMed : 22402786 |
| DOI : 10.1039/c2cp23940j |
| Fiche détaillée |  Récupérer au format |
 |
| Physical Chemistry Chemical Physics 14, 15 (2012) 5265-5271 |
|
|
|
|
| High-pressure spin-crossover in a dinuclear Fe(ii) complex. |
|
|
| Helena J. Shepherd 1Patrick Rosa 2 |
|
|
| (2012) |
|
|
|
| The effect of pressure on the dinuclear spin crossover material [{Fe(bpp)(NCS)(2)}(2)(4,4'-bipy)]*2MeOH (where bpp = 2,6-bis(pyrazol-3-yl)pyridine and 4,4'-bipy = 4,4'-bipyridine, 1) has been investigated with single crystal X-ray diffraction and Raman spectroscopy using diamond anvil cell techniques. The very gradual pressure-induced spin crossover occurs between 7 and 25 kbar, and shows no evidence of crystallographic phase transitions. The pressure-induced spin transition leads to a complete LS state which is not thermally accessible. This structural evolution under pressure is in stark contrast to the previously reported thermal spin crossover behaviour, in which a symmetry-breaking, purely structural phase transition results in only partial conversion to the low spin state. This observation is attributed to the symmetry-breaking phase transition becoming unfavourable under pressure. |
|
|
|
|
|
|
|
|
|
|
|
| 1 : | Department of Chemistry |
|
|
|
University of Durham |
|
|
| 2 : | Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) |
|
|
|
CNRS : UPR9048 – Université de Bordeaux – Ecole Nationale Supérieure de Chimie, de Biologie et de Physique |
|
|
| 3 : | Laboratoire de chimie de coordination (LCC) |
|
|
|
CNRS : UPR8241 |
|
|
| 4 : | Diamond Light Source Ltd |
|
|
|
Diamond Light Source Ltd |
|
|
|
|
|
|
|
|
|
| Domaine | : | Chimie/Matériaux |
|
|
| Molecular materials – Spin crossover – High pressure – Iron |
|
| hal-00682930, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00682930 | |
| oai:hal.archives-ouvertes.fr:hal-00682930 | |
| Contributeur : Stéphane Toulin | |
| Soumis le : Mardi 27 Mars 2012, 12:31:57 | |
| Dernière modification le : Mardi 27 Mars 2012, 12:31:57 | |
