Electronic and Magnetic Properties of Mn12 Molecular Magnets on Sulfonate and Carboxylic Acid Prefunctionalized Gold Surfaces (Articolo in rivista)

Type
Label
  • Electronic and Magnetic Properties of Mn12 Molecular Magnets on Sulfonate and Carboxylic Acid Prefunctionalized Gold Surfaces (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/jp3031896 (literal)
Alternative label
  • Fabrizio Moro,*,+,?,# Roberto Biagi,+,? Valdis Corradini,+,? Marco Evangelisti,? Alessandro Gambardella,§ Valentina De Renzi,+,? Umberto del Pennino,+,? Eugenio Coronado,? Alicia Forment-Aliaga,*,? and Francisco M. Romero? (2012)
    Electronic and Magnetic Properties of Mn12 Molecular Magnets on Sulfonate and Carboxylic Acid Prefunctionalized Gold Surfaces
    in Journal of physical chemistry. C
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Fabrizio Moro,*,+,?,# Roberto Biagi,+,? Valdis Corradini,+,? Marco Evangelisti,? Alessandro Gambardella,§ Valentina De Renzi,+,? Umberto del Pennino,+,? Eugenio Coronado,? Alicia Forment-Aliaga,*,? and Francisco M. Romero? (literal)
Pagina inizio
  • 14936 (literal)
Pagina fine
  • 14942 (literal)
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  • 116 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 7 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • +Dipartimento di Fisica, Universita? di Modena e Reggio Emilia, via G. Campi 213/A, 41125 Modena, Italy ?S3 Centre, Institute of Nanoscience-CNR, via G. Campi 213/A, 41125 Modena, Italy §Consiglio Nazionale delle Ricerche-Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), via P. Gobetti 101, 40129 Bologna, Italy ?Instituto de Ciencia de Materiales de Arago?n, CSIC-Universidad de Zaragoza, Departamento de Física de la Materia Condensada, 50009 Zaragoza, Spain ?Instituto Ciencia Molecular (ICMol), Universitat de Vale?ncia C/Catedra?tico Jose? Beltra?n 2, 46980, Paterna, Spain (literal)
Titolo
  • Electronic and Magnetic Properties of Mn12 Molecular Magnets on Sulfonate and Carboxylic Acid Prefunctionalized Gold Surfaces (literal)
Abstract
  • Structural, electronic, and magnetic properties of [Mn12O12(bet)16(EtOH)4](PF6)14·4CH3CN·H2O (in short Mn12bet, bet = betaine = +N(CH3)3-CH2-COO-) singlemolecule magnets (SMMs) deposited on previously functionalized gold surfaces have been investigated. Self-assembled monolayers (SAMs) either of sodium mercaptoethanesulfonate (MES) or mercaptopropionic acid (MPA) are used as functionalization to avoid the direct interaction between the Mn12bet molecules and the Au surface with the aim of preserving the main functional properties of the molecules. Scanning tunneling microscopy (STM) and X-ray photoemission spectroscopy (XPS) analysis show deposited Mn12bet SMMs well-isolated from each other and uniformly distributed on both MES and MPA SAMs. X-ray absorption spectroscopy (XAS) studies show that the oxidation state of the mixed-valence Mn12bet core is largely reduced to Mn2+ when molecules are deposited on MES-SAM, whereas in the case of MPA-SAM the relative weights of Mn2+, Mn3+, and Mn4+ in the Mn12bet core are preserved. Despite the substantial retaining of their electronic properties, the magnetization of Mn12bet molecules deposited on MPA-SAM measured by X-ray magnetic circular dichroism (XMCD) is perturbed with respect to the pristine molecules. (literal)
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