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

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 18; no. 6; pp. 2141 - 2146
• Main Authors: Do, Won Hui, Lee, Chul Jae, Kim, Dong Yeub, Jung, Maeng Joon
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.11.2012; 한국공업화학회
• Subjects: 2-Mercaptopyridine; 4-Mercaptopyridine; Chemical bonds; Gamma irradiation; Nanoparticles; Orientation; Raman scattering; SERS; Silver; Slivers; Spectra; Surface chemistry; Tollen's method; 화학공학; Gamma irradiation; 2-Mercaptopyridine; 4-Mercaptopyridine; SERS; Tollen's method
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2012.06.009

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 (SERS). 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'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.