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http://dx.doi.org/10.5012/bkcs.2009.30.12.2930

Surface-enhanced Raman Spectroscopy of Benzimidazolic Fungicides: Benzimidazole and Thiabendazole  

Kim, Mak-Soon (Department of Chemistry Education, Kyungpook National University)
Kim, Min-Kyung (Department of Chemistry Education, Kyungpook National University)
Lee, Chul-Jae (Division of Chemical Industry, Yeungnam College of Science & Technology)
Jung, Young-Mee (Department of Chemistry, Kangwon National University)
Lee, Mu-Sang (Department of Chemistry Education, Kyungpook National University)
Publication Information
Abstract
Surface-enhanced Raman Scattering (SERS) spectroscopy is applied to the study of the adsorption of benzoimidazolic fungicides benzimidazole (BIZ) and thiabendazole (TBZ) on silver mirrors. The influence of pH on the adsorption mechanism was investigated. In case of BIZ, two different adsorption mechanisms are deduced depending on the experimental conditions: via the $\pi$ electrons of the ring in neutral conditions and through an ionic pairing of protonated nitrogen atom with the chloride adsorbed on the metal surface. The SERS spectra of TBZ revealed that most molecules were adsorbed on silver surface by the ${\pi}$ electrons in neutral and acidic conditions but in acid conditions, some molecules were adsorbed via the sulfur and nitrogen atoms tilted slightly to the surface.
Keywords
Surface-enhanced Raman spectroscopy; Fungicide; Benzimidazole; Thiabendazole;
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