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Issue 7, 2016
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Dynamic spin interchange in a tridentate Fe(III) Schiff-base compound

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Abstract

The thermosalient effect is still a rare and poorly understood phenomenon, where crystals suddenly jump, bend, twist or explode upon undergoing a thermally activated phase transition. The synthesis and characterisation of the new spin transition Fe(III) compound [Fe(5-Br-salEen)2][ClO4] (salEen = N-ethyl-N-(2-aminoethyl)salicylaldiminate) is described and its thermosalient behaviour reported. It is the first example of a thermosalient effect with a spin transition and magnetic, calorimetric, diffraction, microscopy and computational studies are used to characterise these effects. Both thermosalient effect and spin transition occur around 320 K upon heating and are accompanied by an anisotropic unit cell change with conservation of crystal symmetry that causes a large enough stress of the crystal lattice to induce crystal explosion. This stress can ultimately be traced back to a diffusionless and distortive structural perturbation resulting in a coupled spin transition-thermosalient effect.

Graphical abstract: Dynamic spin interchange in a tridentate Fe(iii) Schiff-base compound

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Publication details

The article was received on 27 Nov 2015, accepted on 16 Mar 2016 and first published on 17 Mar 2016


Article type: Edge Article
DOI: 10.1039/C5SC04577K
Citation: Chem. Sci., 2016,7, 4251-4258
  • Open access: Creative Commons BY license
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    Dynamic spin interchange in a tridentate Fe(III) Schiff-base compound

    A. I. Vicente, A. Joseph, L. P. Ferreira, M. de Deus Carvalho, V. H. N. Rodrigues, M. Duttine, H. P. Diogo, M. E. Minas da Piedade, M. J. Calhorda and P. N. Martinho, Chem. Sci., 2016, 7, 4251
    DOI: 10.1039/C5SC04577K

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