Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 139, Issue 15, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4825382
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Funding
- European Community
- UK Engineering and Physical Sciences Research Council (EPSRC)
- European Commission through the FP7 Initial Training Network SMALL [238804]
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Two single molecule magnets based on the dodecamanganese (III, IV) cluster with either benzoate or terphenyl-4-carboxylate ligands, have been studied on the Au(111) and rutile TiO2(110) surfaces. We have used in situ electrospray deposition to produce a series of surface coverages from a fraction of a monolayer to multilayer films in both cases. X-ray absorption spectroscopy measured at the Mn L-edge (Mn 2p) has been used to study the effect of adsorption on the oxidation states of the manganese atoms in the core. In the case of the benzoate-functionalised complex reduction of the manganese metal centres is observed due to the interaction of the manganese core with the underlying surface. In the case of terphenyl-4-carboxylate, the presence of this much larger ligand prevents the magnetic core from interacting with either the gold or the titanium dioxide surfaces and the characteristic Mn3+ and Mn4+ oxidation states necessary for magnetic behaviour are preserved. (C) 2013 AIP Publishing LLC.
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