title: Comparison of the adsorption orientation for 2-mercaptobenzothiazole and 2-mercaptobenzoxazole by SERS spectroscopy.
abstract: In this study, the adsorption orientation for 2-mercaptobenzothiazole (MBT) and 2-mercaptobenzoxazole (MBO) on to silver mirror and silver sol substrates have been studied by surface enhanced Raman scattering (SERS). The MBT and MBO were chemisorbed on both silver mirror and silver sol after deprotonation with a tilted orientation to the silver surfaces. The surface enhanced properties of MBT and MBO showed that the substrate of silver mirror was superior to the sliver sol. The SERS spectra of MBT and MBO revealed that both of the MBT and MBO were adsorbed on silver surfaces strongly by a common sulfur molecule and a sulfur atom from MBT and an oxygen atom from MBO. Therefore, the adsorption orientation of MBT and MBO was little tilted perpendicularly to the silver surfaces. The adsorption geometry did not undergo any significant changes in acidic and basic solutions. It showed that the adsorption orientation for MBT and MBO were stable in the both solutions.
authors: Department of Chemistry, Graduate School, Kyungpook National University, Daegu, South Korea.
authors: Chul Jae
authors: CJ
authors: Lee
authors: Seung Yong
authors: SY
authors: Lee
authors: Mohammad Rezaul
authors: MR
authors: Karim
authors: Mu Sang
authors: MS
authors: Lee
mesh_terms: D000327:Adsorption; D052160:Benzothiazoles / Q000737:chemistry*; D001583:Benzoxazoles / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D012834:Silver / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D014732:Vibration
chemical_list: D052160:Benzothiazoles; D001583:Benzoxazoles; D013438:Sulfhydryl Compounds; D012834:Silver; C005563:captax; C525534:2-mercaptobenzoxazole