Unsupported Au(I)...Cu(I) interactions: influence of nitrile ligands and aurophilicity on the structure and luminescence

  1. Fernández, E.J. 1
  2. Laguna, A. 2
  3. López-De-Luzuriaga, J.M. 1
  4. Monge, M. 1
  5. Montiel, M. 1
  6. Olmos, M.E. 1
  7. Rodríguez-Castillo, M. 1
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 Instituto de Nanociencia y Materiales de Aragón
    info

    Instituto de Nanociencia y Materiales de Aragón

    Zaragoza, España

    ROR https://ror.org/031n2c920

Revista:
Dalton Transactions

ISSN: 1477-9226

Año de publicación: 2009

Volumen: 36

Páginas: 7509-7518

Tipo: Artículo

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DOI: 10.1039/B900768G SCOPUS: 2-s2.0-69949138038 WoS: WOS:000269493900026 GOOGLE SCHOLAR

Otras publicaciones en: Dalton Transactions

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Resumen

The synthesis, structural characterization and the study of the photophysical properties of complexes [AuCu(C6F5) 2(NC-CH3)2] 1, [AuCu(C6F 5)2(NC-Ph)2]22, and [AuCu(C 6F5)2(NC-CHCH-Ph)2] 3 have been carried out. The crystal structures of complexes 1-3 consist of dinuclear Au-Cu units built from mediated metallophilic Au(i)⋯Cu(i) interactions. In the case of complex 2 two dinuclear units interact via an aurophilic interaction leading to a tetranuclear Cu-Au-Au-Cu arrangement. Complex 2 is brightly luminescent in solid state at room temperature and at 77 K with a lifetime in the nanoseconds range, while complexes 1 and 3 do not display luminescence under the same conditions. The presence of the aurophilic interaction in complex 2 seems to be responsible for the blue luminescence observed. DFT and time-dependent DFT calculations agree with the experimental results and support the idea that the origin of the luminescence of these complexes arise from orbitals located in the interacting metals. © The Royal Society of Chemistry 2009.