Abstract
Temporal changes in the surface-enhanced Raman scattering (SERS) of 4-vinylbenzoic acid (4vba) adsorbed on silver colloid surfaces were studied using a method in which the solution of the adsorbate-covered colloid solution flowed through a capillary at differing rates. In this way the photochemical effect of the illuminating laser was studied quantitatively. 4vba appears to exist on the colloid surface in two forms: one that photodesorbs under the influence of the laser and one that does not. An analysis of the SERS spectra suggests that the former adopts a surface geometry in which the benzene ring and carboxylate group are adsorbed flat on surface but where the vinyl group is not bonded directly to the surface. In the latter, all three groups are adsorbed on surface simultaneously: the benzene and vinyl groups are π-bonded, while the carboxylate group is adsorbed through a nonbonding electron pair of one of its oxygens. The photodesorption rate constant was found to be proportional to laser power. Its...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
