Thermal and optical control of electronic states in a single layer of switchable paramagnetic molecules
AuthorPoneti, G; Poggini, L; Mannini, M; Cortigiani, B; Sorace, L; Otero, E; Sainctavit, P; Magnani, A; Sessoli, R; Dei, A
Source TitleChemical Science
PublisherROYAL SOC CHEMISTRY
University of Melbourne Author/sSORACE, LORENZO
AffiliationSchool of Chemistry
Document TypeJournal Article
CitationsPoneti, G., Poggini, L., Mannini, M., Cortigiani, B., Sorace, L., Otero, E., Sainctavit, P., Magnani, A., Sessoli, R. & Dei, A. (2015). Thermal and optical control of electronic states in a single layer of switchable paramagnetic molecules. CHEMICAL SCIENCE, 6 (4), pp.2268-2274. https://doi.org/10.1039/c5sc00163c.
Access StatusOpen Access
The control of the charge distribution in a monolayer of switchable cobalt-dioxolene complexes undergoing Valence Tautomerism (VT) has been achieved by means of thermal and optical stimuli. Thiol-derivatised VT molecules have been grafted on polycrystalline gold surface as monolayers from solution. X-ray photoelectron spectroscopy and time-of-flight secondary ions mass spectrometry evidenced the formation of a covalent bond between intact VT molecules and the surface and excluded the presence of physisorbed molecules. X-ray absorption spectroscopy revealed that the temperature- and light-induced conversion profiles of the monolayer closely reproduce the ones found for the crystalline phase. This study demonstrates that a wet chemistry based approach allows to transfer switchable paramagnetic molecules at the nanoscale, widening the playground to develop new hybrid molecular based architectures for novel technologies.
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