The Zn polymorphic analogues of the [Fe(PM–PEA)2(NCS)2] spin-transition compound

Frédéric Le Gac (1) , Philippe Guionneau (1) , Jean-François Létard (1) , Patrick Rosa (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

We have studied the peculiarities of complex [Zn(PM–PEA)2(NCS)2], which presents large void cavities. As powder it does not show solvent inclusion, while as single crystals we have evidenced the existence of various polymorphs, with and without solvent inclusion. These results are preliminary results for the comprehension of the behaviour of mixed [FexZn1−x(PM–PEA)2(NCS)2], where Zn has been used to decrease the cooperative interactions between Fe atoms and check the effects on the wide hysteresis reported for this compound.

Mots clés: X-ray crystal structures; Polymorphism; Spin crossover

Domaines: Matériaux

Frédéric Le Gac, Philippe Guionneau, Jean-François Létard, Patrick Rosa. The Zn polymorphic analogues of the [Fe(PM–PEA)2(NCS)2] spin-transition compound. Inorganica Chimica Acta, 2008, 361 (12-13), pp.3519-3524. ⟨10.1016/j.ica.2008.03.011⟩. ⟨hal-00319938⟩