Surface-enhanced raman scattering form Ag-KCl-pyridinecarboxylic acid system

Abstract

The surface-enhanced Raman scattering (SERS) spectra of a-, b- and g-pyridinecarboxylic acids are compared with the Raman spectra of the solid compounds, aqueous solns., and related silver complexes. There is considerable Raman surface-enhancement in Ag-KCl-g-pyridinecarboxylic acid and Ag-KCl-a-pyridinecarboxylic acid systems. The enhancement factor is about 106 for g-pyridinecarboxylic acid, 104-105 for the a-isomer and 103 for the b-isomer. The behavior of catalytic waves of these isomers has been studied in H3PO4 + NaH2PO4 buffer solution The results show that there is a parallelism between enhancement factor and adsorption ability of pyridinecarboxylic acid. The mechanism of adsorption and SERS of these isomers are discussed.

Key words: SILVER, ADSORPTION, PULSE POLAROGRAPHY, POTASSIUM CHLORIDE, ISOMER, MERCURY ELECTRODE, PYRIDINECARBOXYLIC ACID, RAMAN SPECTROMETRY

CLC Number:

O657

Cite this article

SHEN BO;WANG JIANPING;YU ZUZHAN;LAO PUDONG;CAO YI. Surface-enhanced raman scattering form Ag-KCl-pyridinecarboxylic acid system[J]. Acta Chimica Sinica, 1988, 46(5): 503-506.

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银-氯化钾-吡啶甲酸体系的表面增强Raman光谱