Surface enhanced raman and resonance raman spectroscopy in a non-aqueous electrochemical environment: Tris(2,2′-bipyridine)ruthenium(II) adsorbed on silver from acetonitrile

✍ Scribed by A.A. Stacy; R.P. Van Duyne

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 501 KB
• Volume: 102
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(83)87057-2

✦ Synopsis

This letter reports the first observation of both surface enhanced Raman scatterins (SERS) and surface enhanced resonanre Raman scattering (SERRS) from the transition metal complex tris(2.2'-bipyridine)ruthcnium(iI), Ru(bpy)<+. adsorbed on a silver electrode from acetonitrile (ACN). The assignment of these spectra asvalid 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);+ using double potential step chronocoulometry (DPSCC); (2) the Raman sigtals are most intcnsc after surface roughcnin_e by anodization;(3) the Raman spectra are potential dependent in the non-faradaic potential region; (4) the measured enhancement factors are greater than 106; (5) the surface spectra are frequency shifted relative to their bulk counterparts: and (6) several other molecules also exhibit non-aqueous SERS and SERRS behavior. These results are highly sixniticant in that the generality of surfxe enhanced Raman spectroscopy has been extended into the rich domain of non-, aqueous electrochemistry.