Issue 22, 2011

A multi-scale approach to spin crossover in Fe(ii) compounds

Abstract

We report here for the first time a multi-scale study on the concept of spin-crossover compounds, which integrates improved density functionals, a polarizable force field and hybrid QM/MM calculations. This multi-scale setup is applied to the temperature dependence of spin states of a Fe(II) compound with trispyrazolylborate ligands that exhibits spin-crossover. Our study shows a transition temperature of around 290 K, which is in perfect agreement with experimental results. Moreover, based on our data we provide the origin of why spin transition occurs in this iron-compound: it results directly from spin-state changes in the iron-compound that lead to more favourable electrostatic interactions for the high-spin state.

Graphical abstract: A multi-scale approach to spin crossover in Fe(ii) compounds

Supplementary files

Article information

Article type
Paper
Submitted
07 Mar 2011
Accepted
22 Mar 2011
First published
19 Apr 2011

Phys. Chem. Chem. Phys., 2011,13, 10449-10456

A multi-scale approach to spin crossover in Fe(II) compounds

M. Swart, M. Güell and M. Solà, Phys. Chem. Chem. Phys., 2011, 13, 10449 DOI: 10.1039/C1CP20646J

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