Experimental and Theoretical Evidence of the Existence of Gold(I)⋅⋅⋅Mercury(II) Interactions in Solution through Fluorescence-Quenching Measurements

Authors

  • Dr. Tania Lasanta,

    1. Departamento de Química, Universidad de la Rioja, Centro de Investigación en Síntesis Química (CISQ), Complejo Científico Tecnológico, 26004 Logroño (Spain), Fax: (+34) 941299621
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  • Prof. Dr. José M. López-de-Luzuriaga,

    Corresponding author
    1. Departamento de Química, Universidad de la Rioja, Centro de Investigación en Síntesis Química (CISQ), Complejo Científico Tecnológico, 26004 Logroño (Spain), Fax: (+34) 941299621
    • Departamento de Química, Universidad de la Rioja, Centro de Investigación en Síntesis Química (CISQ), Complejo Científico Tecnológico, 26004 Logroño (Spain), Fax: (+34) 941299621
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  • Dr. Miguel Monge,

    1. Departamento de Química, Universidad de la Rioja, Centro de Investigación en Síntesis Química (CISQ), Complejo Científico Tecnológico, 26004 Logroño (Spain), Fax: (+34) 941299621
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  • Dr. M. Elena Olmos,

    1. Departamento de Química, Universidad de la Rioja, Centro de Investigación en Síntesis Química (CISQ), Complejo Científico Tecnológico, 26004 Logroño (Spain), Fax: (+34) 941299621
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  • David Pascual

    1. Departamento de Química, Universidad de la Rioja, Centro de Investigación en Síntesis Química (CISQ), Complejo Científico Tecnológico, 26004 Logroño (Spain), Fax: (+34) 941299621
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Abstract

Heteronuclear complexes {[Hg(R)2][Au(R′)(PMe3)]2}n (R=R′=C6Cl2F3 (3); R=R′=C6F5 (4); R=C6Cl2F3, R′=C6F5 (5); R=C6F5, R′=C6Cl2F3 (6)) were prepared by the treatment of the corresponding organomercury compounds, [Hg(C6X5)2], with two equivalents of [Au(C6X5)(PMe3)]. Their crystal structures, as determined by using X-ray diffraction methods, display Au⋅⋅⋅Hg interactions. Although only compound 4 and 5 show luminescence in the solid state, all of these compounds quench the fluorescence of naphthalene in solution. Solution studies of these derivatives suggest a cooperative effect of the gold(I) center in switching on the quenching capabilities of the [Hg(C6X5)2] synthon with naphthalene. Theoretical studies confirmed the quenching ability of the organomercury species in the presence of gold.

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