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Surface Science of Soft Scorpionates

Inorganic Chemistry2010Vol. 49(4), pp. 1420–1427

Citations Over TimeTop 22% of 2010 papers

Dawn Wallace, Edward J. Quinn, David R. Armstrong, J. Reglinski, Mark D. Spicer, W. Ewen Smith

Abstract

The chemisorption of the soft scorpionate Li[PhTm(Me)] onto silver and gold surfaces is reported. Surface enhanced Raman spectroscopy in combination with the Raman analysis of suitable structural models, namely, [Cu(kappa(3)-S,S,S-PhTm(Me))(PCy(3))], [Ag(kappa(3)-S,S,S-PhTm(Me))(PCy(3))], [Ag(kappa(2)-S,S-PhTm(Me))(PEt(3))], and [Au(kappa(1)-S-PhTm(Me))(PCy(3))], are employed to identify the manner in which this potentially tridentate ligand binds to these surfaces. On colloidal silver surface-enhanced Raman spectroscopy (SERS) spectra are consistent with PhTm(Me) binding in a didentate fashion to the surface, holding the aryl group in close proximity to the surface. In contrast, on gold colloid, we observe that the species prefers a monodentate coordination in which the aryl group is not in close proximity to the surface.

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