Tunable Photoluminescence of Closed Shell Heterobimetallic Au-Ag Dicyanide Layered Systems.

  1. Colis, J.C.F. 2
  2. Larochelle, C. 3
  3. Fernández, E.J. 1
  4. López-De-Luzuriaga, J.M. 1
  5. Monge, M. 1
  6. Laguna, A. 4
  7. Tripp, C. 2
  8. Patterson, H. 2
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 University of Maine
    info

    University of Maine

    Orono, Estados Unidos

    ROR https://ror.org/01adr0w49

  3. 3 Franklin & Marshall College
    info

    Franklin & Marshall College

    Lancaster, Estados Unidos

    ROR https://ror.org/04fp4ps48

  4. 4 Universidad de Zaragoza
    info

    Universidad de Zaragoza

    Zaragoza, España

    ROR https://ror.org/012a91z28

Show affiliations +
Journal:
Journal of Physical Chemistry B

ISSN: 1520-6106

Year of publication: 2005

Volume: 109

Issue: 10

Pages: 4317-4323

Type: Article

DOI: 10.1021/JP045868G SCOPUS: 2-s2.0-15944393981 WoS: WOS:000227629700005 GOOGLE SCHOLAR

More publications in: Journal of Physical Chemistry B

Institutional repository: lock_openOpen access Editor

Abstract

The excited-state properties of the layered La[Ag(CN) 2] 3 and La[Au(CN) 2] 3 systems have been examined and compared with mixed-metal systems of varying metal ratios such as La[Ag 0.78Au 0.22(CN) 2] 3, La[Ag 0.55-Au 0.45(CN) 2] 3, La[Ag 0.33Au 0.67(CN 2] 3, and La[Ag 0.19Au 0.81(CN) 2] 3. We have found that these mixed-metal systems luminesce quite strongly at room temperature at an energy that is tunable and depends on the Au:Ag stoichiometric ratio. The emission energy of the mixed-metal samples lies between those of the pure Au and Ag systems. This provides evidence that the excited states responsible for this emission are delocalized over the Ag and Au centers. The strong luminescence of the mixed-metal systems at ambient temperatures is in stark contrast to the weak luminescence behavior of pure La[Au(CN) 2] 3 and La[Ag(CN 2] 3 samples, which makes the mixed-metal systems more viable than the pure systems for practical applications. © 2005 American Chemical Society.