Analysis of fluorescence quenching of naphthalene by two mercury containing organometallic complexes

  1. López-De-Luzuriaga, J.M. 1
  2. Monge, M. 1
  3. Olmos, M.E. 1
  4. Pascual, D. 1
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

Journal:
Journal of Luminescence

ISSN: 0022-2313

Year of publication: 2014

Volume: 154

Pages: 322-327

Type: Article

DOI: 10.1016/J.JLUMIN.2014.05.005 SCOPUS: 2-s2.0-84901981620 WoS: WOS:000340687600051 GOOGLE SCHOLAR

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Abstract

Two organometallic complexes, named [Hg(2-C6H 4PPh2)2] (1) and [{Au(C6F 5)}2{Hg(2-C6H4PPh2) 2}] (2) have been studied as quenchers of the fluorescence of naphthalene. Positive deviations were observed in the Stern-Volmer (S-V) plots for both quenchers. The analyses of the data reveal the existence of transient components in the dynamic quenching. The diffusion coefficients of these complexes have been obtained by two different methods, through the Stokes-Einstein equation, and from 1H PGSE NMR experiments. With these values, and taking into account the experimental KT constants, the radii of the transient quenching spheres were obtained, which show unusually large values. © 2014 Elsevier B.V.