Issue 7, 2016

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

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

Supplementary files

Article information

Article type
Edge Article
Submitted
27 Nov 2015
Accepted
16 Mar 2016
First published
17 Mar 2016
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2016,7, 4251-4258

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

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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