Adsorption of 2-mercaptopyridine and 4-mercaptopyridine on a silver surfaces investigated by SERS spectroscopy

作者：Do Won Hui; Lee Chul Jae; Kim Dong Yeub; Jung Maeng Joon^*

来源：Journal of Industrial and Engineering Chemistry, 2012, 18(6): 2141-2146.

DOI：10.1016/j.jiec.2012.06.009

• SERS
• 2-Mercaptopyridine
• 4-Mercaptopyridine
• Tollen%26apos
• s method
• Gamma irradiation

In this study, the 2-mercaptopyridine (2-MPY) and 4-mercaptopyridine (4-MPY) on to silver mirror and silver sol substrates have been studied by surface enhanced Raman scattering (SEAS). The surface enhanced properties of 2-MPY and 4-MPY showed that the substrate of silver mirror was superior to the sliver sol. The silver mirror and silver sol substrates were prepared by Tollen%26apos;s and gamma irradiation method respectively. UV-visible spectra indicate that Ag nanoparticles were produced by this method. Considerable differences were found in the SERS spectra of 2-MPY and 4-MPY molecules onto silver mirror and silver sol substrates. From the analysis of the SERS data, it was evidenced that 2-MPY was chemisorbed through its S atom to Ag surfaces at a perpendicular orientation, whereas 4-MPY was bonded to Ag surface via the S atom and N atom assuming a tilted orientation.

• 出版日期2012-11-25