Asymmetric spin crossover behaviour and evidence of light-induced excited spin state trapping in a dinuclear iron(II) helicate

D. Pelleteret (1) , Rodolphe Clérac (2) , Corine Mathonière (3) , Etienne Harté (2) , W. Schmitt (1) , P. E. Kruger (1, 4)

1 School of Chemistry
2 CRPP - Centre de recherches Paul Pascal
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
4 Department of Chemistry

Reported herein are the synthesis, structural and magnetic characterisation of a dinuclear FeII triple helicate that displays an unprecedented reversible asymmetric high spin to low spin crossover characterised by a thermal hysteresis: indeed the high spin state can be recovered by white light irradiation at 10 K.

Mots clés: Iron(II); Spin crossover; LIESST

Domaines: Matériaux

D. Pelleteret, Rodolphe Clérac, Corine Mathonière, Etienne Harté, W. Schmitt, et al.. Asymmetric spin crossover behaviour and evidence of light-induced excited spin state trapping in a dinuclear iron(II) helicate. Chemical Communications, 2009, 2, pp.221-223. ⟨10.1039/b816196h⟩. ⟨hal-00353296⟩