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Raman spectra of pyridine adsorbed on a copper electrode

✍ Scribed by M.L.A. Temperini; H.C. Chagas; O. Sala

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
371 KB
Volume
79
Category
Article
ISSN
0009-2614

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✦ Synopsis

The surface enhanced Raman scattering (SERS) of pyndtne adsorbed on a copper electrode was observed with 647 1 nm ercztatlon and the dependence of the Raman tntenslty as a fun~on of electrode potential was obtarned for the most mtense bands The results are compared with reported mtenslty and frequency values for the sdver/pyrtdme system

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Raman spectroscopy has been employed for the first time to study the role of adsorption at electrodes. It has been possible to distinguish two types of pyridine adsorption at a silver electrode. The variation in intensity and frequency of some of the bands with potential in the region of the point o

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The attenuated total reΓ‘ection (ATR) method was applied to obtain the Ðrst layer enhancement in the case of pyridine adsorbed on Cu(100), ( 111) and ( 110) and a (110) vicinal surface, the values being 3, 19, 40 and 83 respectively. By comparison of the Raman bands and the enhancement at the Cu(111)