SURFACE-ENHANCED RAMAN-SPECTROSCOPIC STUDY OF ISOMERIC ANISIDINES ADSORBED ON COLLOIDAL SILVER PARTICLES

被引:14
作者
SARKAR, UK [1 ]
CHAKRABARTI, S [1 ]
MISRA, TN [1 ]
机构
[1] INDIAN ASSOC CULTIVAT SCI,DEPT SPECTROSCOPY,CALCUTTA 700032,W BENGAL,INDIA
关键词
D O I
10.1002/jrs.1250240207
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
Surface-enhanced Raman scattering (SERS) spectra of o-, m- and p-anisidine molecules were compared with the solution Raman spectra. The experimental results suggest that the o- and m-anisidine molecules are adsorbed on the metal surface principally through the nitrogen atom, whereas the p-anisidine molecules are adsorbed through the pi-system of the phenyl ring. This observation is explained in terms of the electron densities on the N and O atoms and in the phenyl ring as reflected by the Hammett sigma values of the isomers. Charge-transfer interactions have been shown to contribute significantly to SERS.
引用
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页码:97 / 100
页数:4
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