Surface-Enhanced Raman Spectroscopy and Electrochemical studies of 4-Phenylpyridine Adsorption at the Silver/Solution Interface

• Autorzy: Bukowska J. , Calvo M. , Jurkiewicz-Herbich M. , Jackowska K.
• Języki publikacji: EN

Abstrakty

EN

The adsorption of 4-phenylpyridine (4-PhPy) on silver was examined using conventional electrochemical techniques: cyclic voltammetry, impedance measurements and surface enhanced Raman spectroscopy (SERS) in a wide range of electrode potentials. Electrochemical results indicate a weaker adsorption of 4-PhPy molecules on Ag than on Au electrode, but considerably stronger than adsorption of pyridine. For saturated solutions the Raman results point out the reorientation of the 4-PhPy molecules from more flat configuration at potentials more positive than -0.7 V vs SCE, to more perpendicular one at more negative potentials. This reorientation may be connected with the formation of stable surface complexes at potentials more positive than -0.7 V and of molecular stacks at more negative electrode potentials.

Słowa kluczowe

EN

silver; 4-phenylpyridine; differential capacity; SERS; adsorption

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2002
• Tom: Vol. 76 / nr 8
• Strony: 1151--1162
• Opis fizyczny: Bibliogr. 25 poz., rys.

Twórcy

autor

Bukowska J.

• Department of Chemistry, Warsaw University, ul. Pasteura 1, 02-093 Warsaw, Poland

autor

Calvo M.

• Department of Chemistry, Warsaw University, ul. Pasteura 1, 02-093 Warsaw, Poland

autor

Jurkiewicz-Herbich M.

• Department of Chemistry, Warsaw University, ul. Pasteura 1, 02-093 Warsaw, Poland

autor

Jackowska K.

• Department of Chemistry, Warsaw University, ul. Pasteura 1, 02-093 Warsaw, Poland

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