Competitive Adsorption of 4-Methyl-4H-1,2,4-triazole-3-thiol and Na Salt of Phytic Acid on a Silver Surface: Raman Spectral and Electrochemical Observations
| Autor: | Ying-Cheng Pan, Xuan Zhu, Rui Zhang, Haifeng Yang, Zongrang Zhang, Yao Wang, Na Wang, Yiping Sun, Wei Song |
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| Rok vydání: | 2009 |
| Předmět: |
chemistry.chemical_classification
Inorganic chemistry 1 2 4-Triazole Salt (chemistry) Electrochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound symbols.namesake General Energy chemistry Monolayer Thiol symbols Molecule Physical and Theoretical Chemistry Raman spectroscopy Raman scattering |
| Zdroj: | The Journal of Physical Chemistry C. 113:9748-9754 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp900329s |
| Popis: | The competitive adsorption of the Na salt of phytic acid (PA) and 4-methyl-4H-1,2,4-triazole-3-thiol (4-MTTL) was investigated by using the surface-enhanced Raman scattering (SERS) technique and electrochemical measurements. On the basis of the recorded SERS spectra, it was found that PA molecules could competitively occupy the silver surface modified with 4-MTTL monolayers and that the competitive adsorption of 4-MTTL at the silver surface with the PA monolayers also happened, but the effect of coadsorption of PA on the structure of 4-MTTL monolayers was smaller than that of 4-MTTL on the PA monolayers. In addition, according to the electrochemical measurements, the only 4-MTTL monolayers or the only PA monolayers at the silver surface exhibited a reasonable stability. The coadsorption of 4-MTTL and PA formed a mixed film at the silver surface immersed in the solution with the coexistence of 4-MTTL and PA, and the film was unstable when a potential was applied. |
| Databáze: | OpenAIRE |
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