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Issue 6, 2009
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Chemical disorder and spin crossover in a mixed ethanol–2-propanol solvate of FeII tris(2-picolylamine) dichloride

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Abstract

We compare the macroscopic and magnetic properties of three spin crossover compounds, [FeII(2-pic)3]Cl2·EtOH, [FeII(2-pic)3]Cl2·2-PrOH and [FeII(2-pic)3]Cl2·(EtOH)0.744·(2-PrOH)0.256 (pic = picolylamine), with their crystal structures in high-spin, low-spin and photoexcited high-spin states. We show that the spin conversion process is affected not only by the presence of solvent molecules in the crystal structure, but also by their occupational disorder in the mixed ethanol2-propanol solvate. The solvent mixture induces a new spin crossover scenario, in which intermediate ordering of spin states is suppressed, the transition temperature is shifted and cooperativity is reduced relative to the parent, pure ethanol and 2-propanol, solvates.

Graphical abstract: Chemical disorder and spin crossover in a mixed ethanol–2-propanol solvate of FeII tris(2-picolylamine) dichloride

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Article information


Submitted
05 Jan 2009
Accepted
03 Mar 2009
First published
14 Apr 2009

New J. Chem., 2009,33, 1277-1282
Article type
Paper

Chemical disorder and spin crossover in a mixed ethanol2-propanol solvate of FeII tris(2-picolylamine) dichloride

D. Chernyshov, B. Vangdal, K. W. Törnroos and H. Bürgi, New J. Chem., 2009, 33, 1277
DOI: 10.1039/B823514G

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