Photo-induced spin-transition: the role of the iron(II) environment distortion
Language
en
Article de revue
This item was published in
Acta Crystallographica Section B : Structural Science [1968-2013]. 2005, vol. 61, n° 1, p. 25-28
International Union of Crystallography
English Abstract
The [FeLn(NCS)2] iron(II) spin-crossover complexes cover a wide range of magnetic behaviour. Owing to the large number of known structural and magnetic data, this series is perfectly adapted to the investigation of the ...Read more >
The [FeLn(NCS)2] iron(II) spin-crossover complexes cover a wide range of magnetic behaviour. Owing to the large number of known structural and magnetic data, this series is perfectly adapted to the investigation of the structure-magnetic properties relationship. In this paper we propose a new structural parameter, denoted [Theta], which is used to correlate the features of the spin-crossover phenomena with the distortion of the iron environment. In particular, this parameter has shed light on the role of such distortion on the limiting temperature of photo-inscription, known as T(LIESST). A strong dependence of T(LIESST) on [Theta] is clearly demonstrated. The stronger the distortion the higher the T(LIESST) value. This structure-property dependence represents, for instance, a powerful tool to estimate the highest potential T(LIESST) value for a series of complexes. This limit in the [FeLn(NCS)2] series is estimated to be around 120 K, which probably prevents their use in any industrial application.Read less <
English Keywords
Spin crossover
Photo-induced transition
Metal environment distortion
Structure-property relationship
Iron complexes
Origin
Hal imported