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Localization vs. Delocalization in Molecules and Clusters: Electronic and Vibronic Interactions in Mixed Valence Systems

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Molecular Magnetism: From Molecular Assemblies to the Devices

Part of the book series: NATO ASI Series ((NSSE,volume 321))

Abstract

The interplay between electron delocalization and magnetic interactions play a key role in areas as diverse as solid state chemistry (bulk magnetic materials, superconductors,...) [1] and biology (iron-sulfur proteins, manganese-oxo clusters ...) [2]. In molecular inorganic chemistry these two electronic processes have been traditionally studied independently. Thus, the electron dynamics has been extensively investigated in mixedvalence dimers [3] as exemplified by the Creutz-Taube complex [(NH3)5RuII(pyrazine)RuIII(NH3)5]. In this kind of molecular complexes one extra electron is delocalized over two diamagnetic metal sites. Therefore, they constitute model systems for the study of the electron transfer. Furthermore, their simplicity allowed also to treat at the molecular scale the coupling of electronic and nuclear movements (vibronic interactions), which is an inherent problem for the MV systems since the itinerant electron produces a strong deformation of the coordination sphere of the metal site [4]. The vibronic theory of MV dimers has been formulated by Piepho, Krausz and Schatz and referred to as PKS model [5].

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Author information

Authors and Affiliations

  1. Departamento de Química Inorgánica. Facultad Química, Universidad de Valencia, C/ Dr. Moliner, 50, 46100, Burjassot, Spain

    J. J. Borras-Almenar, E. Coronado & B. S. Tsukerblat

  2. ICMCB, Av. du Docteur A. Schweitzer, 33600, Pessac, France

    R. Georges

  3. Quantum Chemistry Dept., Institute of Chemistry, Moldavian Academy of Science, Academy str. 3, 277028, Kishinev, Rep. Moldova

    B. S. Tsukerblat

Authors
  1. J. J. Borras-Almenar
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  2. E. Coronado
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  3. B. S. Tsukerblat
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  4. R. Georges
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Editor information

Editors and Affiliations

  1. Dept. de Química Inorgánica, Universidad de Valencia, Dr. Moliner 50, 46100, Burjassot, Valencia, Spain

    Eugenio Coronado

  2. Centre de Reserches Paul Pascal, CRPP-CNRS, Université de Bordeaux I, Av. A. Schweitzer, 33600, Pessac, Talence, France

    Pierre Delhaès

  3. Dipartimento di Chimica, Universitá degli Studi di Firenze, Via Maragliano, 75/77, 50144, Firenze, Italy

    Dante Gatteschi

  4. Dept. of Chemistry, University of Utah, 84112, Salt Lake City, Utah, USA

    Joel S. Miller

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© 1996 Springer Science+Business Media Dordrecht

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Borras-Almenar, J.J., Coronado, E., Tsukerblat, B.S., Georges, R. (1996). Localization vs. Delocalization in Molecules and Clusters: Electronic and Vibronic Interactions in Mixed Valence Systems. In: Coronado, E., Delhaès, P., Gatteschi, D., Miller, J.S. (eds) Molecular Magnetism: From Molecular Assemblies to the Devices. NATO ASI Series, vol 321. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2319-0_5

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  • DOI: https://doi.org/10.1007/978-94-017-2319-0_5

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-90-481-4724-3

  • Online ISBN: 978-94-017-2319-0

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