SURFACE ENHANCED RAMAN-SPECTROSCOPIC STUDY OF ALPHA-BITHIOPHENE AND ALPHA-QUATERTHIOPHENE MOLECULES ADSORBED ON SILVER SOLS

被引：17

作者：

SARKAR, UK ^{[1
]}

CHAKRABARTI, S ^{[1
]}

PAL, AJ ^{[1
]}

MISRA, TN ^{[1
]}

机构：

[1] INDIAN ASSOC CULTIVAT SCI,DEPT SPECT,CALCUTTA 700032,W BENGAL,INDIA

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 1992年 / 48卷 / 11-12期

关键词：

D O I：

10.1016/0584-8539(92)80236-P

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Surface enhanced Raman scattering (SERS) has been observed from alpha-bithiophene (2T) and alpha-quaterthiophene (4T) adsorbed on Ag sols. Experimental results suggest that the adsorbed oligothiophene molecules are anti but twisted and the twist angle is smaller in the surface adsorbed state than in solution. It has been observed that the enhancement factor decreases with the increase of the chain length and maximum enhancement is obtained at a higher concentration for the longer oligomer. The Raman excitation frequency dependence of the enhancement suggests a significant classical electromagnetic contribution to the SERS of oligothiophenes in Ag sols

引用

页码：1625 / 1630

页数：6

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