VIBRATIONAL SPECTROSCOPIC STUDY OF THE ADSORPTION OF PYRIDINE AT THE AU(111)-ELECTROLYTE INTERFACE BY IN-SITU DIFFERENCE-FREQUENCY-GENERATION

Authors
HEBERT P LERILLE A ZHENG WQ TADJEDDINE A
Citation
P. Hebert et al., VIBRATIONAL SPECTROSCOPIC STUDY OF THE ADSORPTION OF PYRIDINE AT THE AU(111)-ELECTROLYTE INTERFACE BY IN-SITU DIFFERENCE-FREQUENCY-GENERATION, Journal of electroanalytical chemistry [1992], 447(1-2), 1998, pp. 5-9
Citations number
24
Categorie Soggetti
Electrochemistry,"Chemistry Analytical
Journal title
Journal of electroanalytical chemistry [1992]
ISSN journal
15726657 → ACNP
Volume
447
Issue
1-2
Year of publication
1998
Pages
5 - 9
Database
ISI
SICI code
Abstract
The adsorption geometry of pyridine at the Au(111)/electrolyte interfa ce has been studied for the first time by in situ visible-infrared dif ference frequency generation (DFG) in the spectral range 900-1150 cm(- 1) using the CLIO free electron laser. The pyridine molecule was found to adsorb using the nitrogen lone pair, in an end-on configuration, t he molecular plane being tilted. The potential dependence of the DFG s pectra showed evidences of a reorientation of the molecule around the potential of zero charge (pzc). At a positively charged interface, the molecule tilts towards the surface normal and undergoes a rotation ar ound its C-2 axis. (C) 1998 Elsevier Science S.A. All rights reserved.