Experimental and theoretical evidence of the existence of gold(I)...mercury(II) interactions in solution through fluorescence-quenching measurements
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Universidad de La Rioja
info
ISSN: 0947-6539
Año de publicación: 2013
Volumen: 19
Número: 15
Páginas: 4754-4766
Tipo: Artículo
beta Ver similares en nube de resultadosOtras publicaciones en: Chemistry - A European Journal
Resumen
Heteronuclear complexes {[Hg(R)2][Au(R′)(PMe 3)]2}n (R=R′=C6Cl 2F3 (3); R=R′=C6F5 (4); R=C6Cl2F3, R′=C6F5 (5); R=C6F5, R′=C6Cl2F 3 (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(C 6X5)2] synthon with naphthalene. Theoretical studies confirmed the quenching ability of the organomercury species in the presence of gold. Goldeneye: Complexes of the type{[Hg(R)2] [Au(R′)(PMe3)]2}n (R and R′=perhalophenyl groups), with metallophilic AuI...Hg II interactions, were detected in solution by quenching experiments of arenes, which were reproduced at the theoretical level (see scheme). Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.