Abstract
This letter reports the first observation of both surface enhanced Raman scattering (SERS) and surface enhanced resonance Raman scattering (SERRS) from the transition metal complex tris(2,2′-bipyridine)ruthenium (II), Ru(bpy)32+, adsorbed on a silver electrode from acetonitrile (ACN). The assignment of these spectra as valid examples of SERS and SERRS in a non-aqueous environment is based on the following criteria: (1) in situ demonstration of monolayer surface coverage of Ru(bpy)32+ using double potential step chronocoulometry (DPSCC); (2) the Raman signals are most intense after surface roughening by anodization; (3) the Raman spectra are potential dependent in the non-faradaic potential region; (4) the measured enhancement factors are greater ilian 106; (5) the surface spectra are frequency shifted relative to their bulk counterpart; and (6) several other molecules also exhibit non-aqueous SERS and SERRS behavior. These results are highly significant in that generality of surface enhanced Raman spectroscopy has been extended into the rich domain of nonaqueous electrochemistry.
Original language | English (US) |
---|---|
Pages (from-to) | 365-370 |
Number of pages | 6 |
Journal | Chemical Physics Letters |
Volume | 102 |
Issue number | 4 |
DOIs | |
State | Published - Nov 25 1983 |
Funding
The authors would like to thank J.P. Haushalter, J-M. Lakovits. and A.B. Apkarian for many useful discissions and for esperimental assistance.T he observation by J-P. Haushalter and R.P. van Duyne that Ru(bpy)p adsorbso n GaAs from acetonitrile initiated thesee xperiments [ 171. This researchw as supported by the National Science Foundation (Grant Nos. CHE7S-24866 and CHESZ05SOl) and the Office of Naval Research( Contract No. NO001479-C-0794).
ASJC Scopus subject areas
- General Physics and Astronomy
- Physical and Theoretical Chemistry