Abstract
Both surface-enhanced hyper-Raman spectroscopy (SEHRS) and surface-enhanced Raman spectroscopy (SERS) spectra of pyrazine and pyridine adsorbed on silver electrode surfaces were obtained at different potentials. Although there is a relaxation of the symmetry selection rule to a certain extent, it is demonstrated experimentally here that the SEHR spectrum for a centrosymmetric molecule (pyrazine) shows some new vibrational bands and significant relative intensity changes compared with its SER spectrum. By contrast, the SEHR spectrum for a non-centrosymmetric molecule (pyridine) resembles its SER spectrum and shows the absence of new vibrational bands. Our results also show that SEHRS is more sensitive to the interaction between the adsorbate and the substrate than SERS.
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.
