CINI, Alberto; POGGINI, Lorenzo; CHUMAKOV, Alexander; RUFFER, Rudolf; SPINA, Gabriele; WATTIAUX, Alain; DUTTINE, Mathieu; GONIDEC, Mathieu; FITTIPALDI, Maria; ROSA, Patrick; MANNINI, Matteo

doi:10.1039/C9CP04464G

Métadonnées

Licence d’utilisation du document

CINI, Alberto
Università degli Studi di Firenze = University of Florence = Université de Florence [UniFI]
National Interuniversity Consortium of Materials Science and Technology [INSTM ]

POGGINI, Lorenzo
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

CHUMAKOV, Alexander
European Synchrotron Radiation Facility [ESRF]

Langue

Article de revue

Ce document a été publié dans

Physical Chemistry Chemical Physics. 2020-03-25, vol. 22, n° 12, p. 6626-6637

Royal Society of Chemistry

Résumé en anglais

The spin crossover (SCO) efficiency of [57Fe(bpz)2(phen)] (where bpz = bis(pyrazol-1-yl)borohydride and phen = 9,10-phenantroline) molecules deposited on gold substrates was investigated by means of synchrotron Mössbauer spectroscopy. The spin transition was driven thermally, or light induced via the LIESST (light induced excited spin-state trapping) effect. Both sets of measurements show that, once deposited on a gold substrate, the efficiency of the SCO mechanism is modified with respect to molecules in the bulk phase. A correlation in the distribution of hyperfine parameters in the sublimated films, not evidenced so far in the bulk phase, is reported. This translates into geometrical distortions of the first coordination sphere of the iron atom that seem to correlate with the decreased spin conversion. The work reported clearly shows the potentiality of synchrotron Mössbauer spectroscopy for the characterization of nanostructured Fe-based SCO systems, thus resulting as a key tool in view of their applications in innovative nanoscale devices.< Réduire

Métadonnées

Licence d’utilisation du document

Synchrotron-based Mössbauer spectroscopy characterization of sublimated spin crossover molecules

Langue

Ce document a été publié dans

Résumé en anglais

DOI

Origine

Unités de recherche