Surface effects on a photochromic spin-crossover iron(ii) molecular switch adsorbed on highly oriented pyrolytic graphite.

Autor: Poggini L; Department of Chemistry 'Ugo Schiff' and INSTM Research Unit of Firenze, University of Firenze, I-50019 Sesto Fiorentino, Italy. lorenzo.poggini@unifi.it federico.totti@unifi.it., Londi G; Department of Chemistry 'Ugo Schiff' and INSTM Research Unit of Firenze, University of Firenze, I-50019 Sesto Fiorentino, Italy. lorenzo.poggini@unifi.it federico.totti@unifi.it., Milek M; Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstr. 1, 91058, Erlangen, Germany., Naim A; CNRS, Univ. Bordeaux, ICMCB, UMR5026, F-33600 Pessac, France., Lanzilotto V; Department of Chemistry 'Ugo Schiff' and INSTM Research Unit of Firenze, University of Firenze, I-50019 Sesto Fiorentino, Italy. lorenzo.poggini@unifi.it federico.totti@unifi.it., Cortigiani B; Department of Chemistry 'Ugo Schiff' and INSTM Research Unit of Firenze, University of Firenze, I-50019 Sesto Fiorentino, Italy. lorenzo.poggini@unifi.it federico.totti@unifi.it., Bondino F; CNR-IOM, Laboratorio TASC, Basovizza SS-14, Km 163.5, 34149 Trieste, Italy., Magnano E; CNR-IOM, Laboratorio TASC, Basovizza SS-14, Km 163.5, 34149 Trieste, Italy., Otero E; Synchrotron SOLEIL L'Orme des Merisiers Saint Aubin, BP 48 91192, Gif sur Yvette, France., Sainctavit P; Synchrotron SOLEIL L'Orme des Merisiers Saint Aubin, BP 48 91192, Gif sur Yvette, France and IMPMC-UMR7590, CNRS, Sorbonne université, MNHN 4 place Jussieu, 75005 Paris, France., Arrio MA; IMPMC-UMR7590, CNRS, Sorbonne université, MNHN 4 place Jussieu, 75005 Paris, France., Juhin A; IMPMC-UMR7590, CNRS, Sorbonne université, MNHN 4 place Jussieu, 75005 Paris, France., Marchivie M; CNRS, Univ. Bordeaux, ICMCB, UMR5026, F-33600 Pessac, France., Khusniyarov MM; Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstr. 1, 91058, Erlangen, Germany., Totti F; Department of Chemistry 'Ugo Schiff' and INSTM Research Unit of Firenze, University of Firenze, I-50019 Sesto Fiorentino, Italy. lorenzo.poggini@unifi.it federico.totti@unifi.it., Rosa P; CNRS, Univ. Bordeaux, ICMCB, UMR5026, F-33600 Pessac, France., Mannini M; Department of Chemistry 'Ugo Schiff' and INSTM Research Unit of Firenze, University of Firenze, I-50019 Sesto Fiorentino, Italy. lorenzo.poggini@unifi.it federico.totti@unifi.it.
Jazyk: angličtina
Zdroj: Nanoscale [Nanoscale] 2019 Nov 14; Vol. 11 (42), pp. 20006-20014. Date of Electronic Publication: 2019 Oct 11.
DOI: 10.1039/c9nr05947d
Abstrakt: Thin films of an iron(ii) complex with a photochromic diarylethene-based ligand and featuring a spin-crossover behaviour have been grown by sublimation in ultra-high vacuum on highly oriented pyrolytic graphite and spectroscopically characterized through high-resolution X-ray and ultraviolet photoemission, as well as via X-ray absorption. Temperature-dependent studies demonstrated that the thermally induced spin-crossover is preserved at a sub-monolayer (0.7 ML) coverage. Although the photochromic ligand ad hoc integrated into the complex allows the photo-switching of the spin state of the complex at room temperature both in bulk and for a thick film on highly oriented pyrolytic graphite, this photomagnetic effect is not observed in sub-monolayer deposits. Ab initio calculations justify this behaviour as the result of specific adsorbate-substrate interactions leading to the stabilization of the photoinactive form of the diarylethene ligand over photoactive one on the surface.
Databáze: MEDLINE
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