کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1228734 | 1495216 | 2016 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Experimental and density functional theory study of Raman and SERS spectra of 5-amino-2-mercaptobenzimidazole Experimental and density functional theory study of Raman and SERS spectra of 5-amino-2-mercaptobenzimidazole](/preview/png/1228734.png)
• Raman vibration modes and SERS characteristic peaks of 5-A-2MBI were assigned.
• The molecular electrostatic potential (MEP) of 5-A-2MBI was used to discuss the possible adsorption behavior of 5-A-2MBI.
• The SERS detection limit of 5-A-2MBI was 5 × 10− 7` mol·L− 1.5.
Raman spectroscopy, surface-enhanced Raman spectroscopy (SERS) and density functional theory (DFT) simulations were employed to study 5-amino-2-mercaptobenzimidazole (5-A-2MBI) molecules. Ag colloids were used as SERS substrates which were prepared by using hydroxylamine hydrochloride as reducing agent. Raman vibration modes and SERS characteristic peaks of 5-A-2MBI were assigned with the aid of DFT calculations. The molecular electrostatic potential (MEP) of 5-A-2MBI was used to discuss the possible adsorption behavior of 5-A-2MBI on Ag colloids. The spectral analysis showed that 5-A-2MBI molecules were slightly titled via the sulfur atoms adhering to the surfaces of Ag substrates. The obtained SERS spectral intensity decreased when lowering the 5-A-2MBI concentrations. A final detection limit on the concentration of 5 × 10− 7 mol · L− 1 was gained. SERS proved to be a simple, fast and reliable method for the detection and characterization of 5-A-2MBI molecules.
The SERS spectra of 5-A-2MBI were clearly obtained. The spectral intensities increased with increasing 5-A-2MBI concentrations. The detection limit of 5-A-2MBI was 5 × 10− 7 mol · L− 1. The SERS proved to be a simple, fast and reliable method for the detection and characterization of 5-A-2MBI.Figure optionsDownload as PowerPoint slide
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 153, 15 January 2016, Pages 344–348