Temperature- and Light-Induced Spin Crossover Observed by X-ray Spectroscopy on Isolated Fe(II) Complexes on Gold.
HIRJIBEHEDIN, Cyrus F
London Centre for Nanotechnology
Department of Physics and Astronomy [UCL London]
Department of Chemistry [UCL, London]
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London Centre for Nanotechnology
Department of Physics and Astronomy [UCL London]
Department of Chemistry [UCL, London]
Langue
en
Article de revue
Ce document a été publié dans
Journal of Physical Chemistry Letters. 2013, vol. 4, n° 9, p. 1546-1552
American Chemical Society
Résumé en anglais
Using X-ray absorption techniques, we show that temperature- and light-induced spin crossover properties are conserved for a submonolayer of the [Fe(H2B(pz)2)2(2,2'-bipy)] complex evaporated onto a Au(111) surface. For a ...Lire la suite >
Using X-ray absorption techniques, we show that temperature- and light-induced spin crossover properties are conserved for a submonolayer of the [Fe(H2B(pz)2)2(2,2'-bipy)] complex evaporated onto a Au(111) surface. For a significant fraction of the molecules, we see changes in the absorption at the L2,3 edges that are consistent with those observed in bulk and thick film references. Assignment of these changes to spin crossover is further supported by multiplet calculations to simulate the X-ray absorption spectra. As others have observed in experiments on monolayer coverages, we find that many molecules in our submonolayer system remain pinned in one of the two spin states. Our results clearly demonstrate that temperature- and light-induced spin crossover is possible for isolated molecules on surfaces but that interactions with the surface may play a key role in determining when this can occur.< Réduire
Mots clés en anglais
Spin crossover
UHV evaporation
Submonolayer
X-ray absorption
Iron complexes
Origine
Importé de halUnités de recherche