Photomagnetic studies on spin-crossover solid solutions containing two different metal complexes, [Fe(1-bpp)(2)](x)[M(terpy)(2)](1-x)[BF(4)](2) (M = Ru or Co).

Guillaume Chastanet (1) , Clare A. Tovee (2) , Geoffrey Hyett (2) , Malcolm A. Halcrow (2) , Jean-François Létard (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 School of Chemistry [Leeds]

The photomagnetic properties of two series of spin-crossover solid solutions, [Fe(1-bpp)(2)](x)[Ru(terpy)(2)](1-x)(BF(4))(2) and [Fe(1-bpp)(2)](x)[Co(terpy)(2)](1-x)(BF(4))(2) (1-bpp = 2,6-bis[pyrazol-1-yl]pyridine), have been investigated. For all the materials, the evolution of the T(LIESST) value, the high-spin → low-spin relaxation parameters and the LITH loops were thoroughly studied. Interestingly in the Fe : Co series, along the photo-excitation, cobalt ions are concomitantly converted from low-spin to high-spin states with the iron centres, and also fully relax after light excitation.

Mots clés: Photomagnetic properties; Spin-crossover; Solid solutions; LIESST

Domaines: Matériaux

Guillaume Chastanet, Clare A. Tovee, Geoffrey Hyett, Malcolm A. Halcrow, Jean-François Létard. Photomagnetic studies on spin-crossover solid solutions containing two different metal complexes, [Fe(1-bpp)(2)](x)[M(terpy)(2)](1-x)[BF(4)](2) (M = Ru or Co).. Dalton Transactions, 2012, 41 (16), pp.4896-4902. ⟨10.1039/c2dt12122k⟩. ⟨hal-00684070⟩