Rayleigh relaxation of pyrazine, pyridine and piperidine molecules adsorbed on the roughened Ag electrode by light beating technique
作者:
Guo‐Zhen Wu,
期刊:
Chinese Journal of Chemistry
(WILEY Available online 1991)
卷期:
Volume 9,
issue 1
页码: 34-39
ISSN:1001-604X
年代: 1991
DOI:10.1002/cjoc.19910090105
出版商: Wiley‐VCH Verlag GmbH&Co. KGaA, Weinheim
数据来源: WILEY
摘要:
AbstractThe light beating technique (intensity correlation algorithm) was employed to analyze the Rayleigh scattering from the roughened Ag electrode in very dilute (10−4M) pyrazine, pyridine and piperidine aqueous solutions containing KC1 (0.1 M). The relaxation time is longer when the applied voltages are between −0.4 V and −0.8 V (vs. SCE) where the Raman effect also shows greater surface enhancement. Also observed was that for the piperidine case the relaxation time reaches its maximum at the more negative applied voltage. The origin of the relaxation is attributed mainly to the desorption process of the pyrazine, pyridine and piperidine molecules off the roughened Ag electrode. An electrostatic model was also proposed for the interpretation of these experimental observa
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