Surface Science of Soft Scorpionates

The chemisorption of the soft scorpionate Li[PhTmMe] onto silver and gold surfaces is reported. Surface enhanced Raman spectroscopy in combination with the Raman analysis of suitable structural models, namely, [Cu(κ3-S,S,S-PhTmMe)(PCy3)], [Ag(κ3-S,S,S-PhTmMe)(PCy3)], [Ag(κ2-S,S-PhTmMe)(PEt3)], and [...

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Bibliographic Details
Published in:Inorganic chemistry 2010-02, Vol.49 (4), p.1420-1427
Main Authors: Wallace, Dawn, Quinn, Edward J, Armstrong, David R, Reglinski, John, Spicer, Mark D, Smith, W. Ewen
Format: Article
Language:English
Subjects:
Adsorption
Animals
Electrochemistry - methods
Gold - chemistry
Humans
Male
Metal Nanoparticles - chemistry
Nanotechnology
Protein Conformation
Scorpions - chemistry
Spectrum Analysis, Raman - methods
Surface Plasmon Resonance - methods
Surface Properties
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Summary:The chemisorption of the soft scorpionate Li[PhTmMe] onto silver and gold surfaces is reported. Surface enhanced Raman spectroscopy in combination with the Raman analysis of suitable structural models, namely, [Cu(κ3-S,S,S-PhTmMe)(PCy3)], [Ag(κ3-S,S,S-PhTmMe)(PCy3)], [Ag(κ2-S,S-PhTmMe)(PEt3)], and [Au(κ1-S-PhTmMe)(PCy3)], 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 PhTmMe 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.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic9014898