Abstract
AbstractSurface‐enhanced Raman spectra of 2,2′‐bipyridine, Ru(bpy)(py)4(CIO4)2, Ru(py)6(BF4)2 and Ru(bpy)‐(PVP)(CIO4)2 at the surface of a copper electrode are presented [bpy = 2,2′‐bipyridine; py=pyridine; and PVP =poly(4‐vinylpyridine)]. The dependence of the spectra on potential is demonstrated through presentation of complete spectra at applied potentials from −0.2 to −1 V, as well as in plots of SER intensity vs electrode potential. The effect of excitation wavelength on the spectra is discussed. Significant differences between the potential dependences of these compounds at copper and silver electrode surfaces are shown. SER spectra from the surface‐enhanced resonance Raman active ruthenium complexes could be obtained only with an excitation wavelength longer than 514.5 nm.
Published Version
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