Experimental evidence of vibrational selectivity in surface charge-transfer reactions

Surface (charge-transfer) reactions from polyatomic molecules adsorbed on metals have been investigated by infrared radiation. Examples of laser catalysis on adsorbed SF6, C3H3N (ACN) and CH3I on different surfaces are reported in which clear catalytic products were detected and analyzed. A detailed...

Full description

Saved in:
Bibliographic Details
Published in:Surface science 2001-06, Vol.482-485, p.562-567
Main Authors: Cáceres, J.O, López, J.T, Ureña, A.G
Format: Article
Language:English
Subjects:
Atom–solid interactions
Catalysis
Copper
Surface electrical transport (surface conductivity, surface recombination, etc.)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Surface (charge-transfer) reactions from polyatomic molecules adsorbed on metals have been investigated by infrared radiation. Examples of laser catalysis on adsorbed SF6, C3H3N (ACN) and CH3I on different surfaces are reported in which clear catalytic products were detected and analyzed. A detailed study of ACN adsorbed on Cu was carried out. Thus, the electron emission and CN− yield produced by laser irradiation of acrylonitrile (ACN) adsorbed on a polycrystalline Cu surface were investigated over the 930–953 cm−1 wavenumber range. Both emissions show a clear wavelength dependence with a≈20 cm−1 redshift with repsect to the gas-phase ACN spectrum. The laser catalysis CN− yield is discussed in light with both substrate and adsorbate mediated mechanisms, which seem to be controlling this (charge-transfer) surface reaction. Emphasis is made on the observed vibrational selectivity for this surface reaction.
ISSN:0039-6028
1879-2758
DOI:10.1016/S0039-6028(00)01071-2