Accession Number : ADA193488

Title :   Comparisons between Surface-Enhanced Raman and Surface Infrared Spectroscopies for Strongly Perturbed Adsorbates: Thiocyanate at Gold Electrodes.

Descriptive Note : Technical rept.,

Corporate Author : UTAH UNIV SALT LAKE CITY DEPT OF CHEMISTRY

Personal Author(s) : Pons, Stanley ; Corrigan, Dennis S ; Foley, John K ; Gao, Ping ; Weaver, Michael J

PDF Url : ADA193488

Report Date : 30 Jul 1986

Pagination or Media Count : 25

Abstract : The potential-dependent C-N stretching mode, for thiocyanate adsorbed at the gold aqueous interface is examined by both surface enhanced Raman spectroscopy (SERS) and subtractively normalized interfacial Fourier transform infrared spectroscopy (SNIFTIRS). Both SERS and SNIFTIRS exhibit a C-N stretching band around 2120-2130 wavenumbers over the potential range +500 to -500 mV vs. s.c.e., consistent with the presence of a predominantly S-bound adsorbate. The potential-dependent C-N stretching band frequencies were very similar (within ca. 5 wavenumbers) for SNIFTIRS at smooth and electrochemically roughened gold, as well as for SNIFTIRS and SERS on the latter surface.

Descriptors :   *ADSORBATES, *ELECTRODES, *GOLD, *RAMAN SPECTROSCOPY, *THIOCYANATES, *INFRARED SPECTROSCOPY, *CHEMICAL BONDS, INTERFACES, LIQUIDS

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE