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Thermal conversion of (SCN)2 thin films into the spin crossover complex Fe(phen)2(NCS)2†


* Corresponding authors

a Department of Chemistry, The University of Alabama, Box 870336, Tuscaloosa, AL, USA E-mail: gjs

Heating the spin-crossover (SCO) complex FeII(phen)2(NCS)2 (phen = 1,10-phenanthroline) under high vacuum results in the formation of red films that have been identified as (SCN)2 by IR, Raman, and UV-Vis spectroscopy. After annealing the red films to ∼140 °C under vacuum, purple (paramagnetic) films form and have been identified as Fe(phen)2(NCS)2 by SQUID magnetometry, X-ray photoelectron, Raman and IR spectroscopy. The Fe(phen)2(NCS)2 films exhibit a SCO transition at ∼180 K with a broadened transition temperature range between the high-spin and low-spin states (∼20 K) when compared to the bulk phase, which is ascribed to a broad distribution of molecular environments.


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DOI https://doi.org/10.1039/C3RA22534H
Article type Paper
Submitted 16 Oct 2012
Accepted 09 Jan 2013
First published 06 Feb 2013

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londonchinatown.org Adv., 2013,3, 3745-3754
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Thermal conversion of (SCN)2 thin films into the spin crossover complex Fe(phen)2(NCS)2

E. C. Ellingsworth, B. Turner and G. Szulczewski, londonchinatown.org Adv., 2013,3, 3745 DOI: 10.1039/C3RA22534H

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Edward C. Ellingsworth
Brittany Turner
Greg Szulczewski

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