Surface enhanced Raman scattering of 2,2′ biquinoline adsorbed on colloidal silver particles

被引:78
作者
Chowdhury, J [1 ]
Ghosh, M [1 ]
Misra, TN [1 ]
机构
[1] Indian Assoc Cultivat Sci, Dept Spect, Calcutta 700032, W Bengal, India
关键词
Raman scattering; SERS; biquinoline; silver colloids; charge transfer;
D O I
10.1016/S1386-1425(00)00263-8
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
Surface enhanced Raman scattering (SERS) in silver sol and normal Raman spectra in the bulk and in solution of 2,2' biquinoline (BQ) molecule have been investigated. The observed Raman bands along with their corresponding FTIR bands have been assigned based on the established assignments of the vibrational bands of the parent napthalene and quinoline molecules. Existence of both the cis and trans form of the BQ molecule in solution and in the bulk are inferred from the normal Raman and FTIR spectra, whereas SERS study reveal that in the surface adsorbed state the molecule exists in the cis form. Definite evidence of the charge transfer interaction to the overall contribution in the SER enhancement have been reported. The excitation profile also supports the CT interaction; Estimated enhancement factor of the principal SERS bands indicate that the molecule is adsorbed on the silver surface through both the nitrogen atoms with the molecular plane almost perpendicular to the surface. This preferred orientation of the molecule is in conformity with its existence in the cis form in the surface adsorbed state. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:2107 / 2115
页数:9
相关论文
共 41 条
[1]   ORIENTATIONAL SPECIFICITY OF RAMAN-SCATTERING FROM MOLECULES ADSORBED ON SILVER ELECTRODES [J].
ALLEN, CS ;
VANDUYNE, RP .
CHEMICAL PHYSICS LETTERS, 1979, 63 (03) :455-459
[2]  
Arenas JF, 1998, J RAMAN SPECTROSC, V29, P673, DOI 10.1002/(SICI)1097-4555(199808)29:8<673::AID-JRS291>3.0.CO
[3]  
2-V
[4]   PLASMA RESONANCE ENHANCED RAMAN-SCATTERING BY ADSORBATES ON GOLD COLLOIDS - THE EFFECTS OF AGGREGATION [J].
BLATCHFORD, CG ;
CAMPBELL, JR ;
CREIGHTON, JA .
SURFACE SCIENCE, 1982, 120 (02) :435-455
[5]   ELECTRONIC STRUCTURES FOR ENERGY-RICH PHOSPHATES [J].
BOYD, DB ;
LIPSCOMB, WN .
JOURNAL OF THEORETICAL BIOLOGY, 1969, 25 (03) :403-&
[6]  
Chang R.K., 1982, Surface Enhanced Raman Scattering
[7]  
COONEY RP, 1982, ADV INFRARED RAMAN S, V9, P188
[8]   PLASMA RESONANCE ENHANCEMENT OF RAMAN-SCATTERING BY PYRIDINE ADSORBED ON SILVER OR GOLD SOL PARTICLES OF SIZE COMPARABLE TO THE EXCITATION WAVELENGTH [J].
CREIGHTON, JA ;
BLATCHFORD, CG ;
ALBRECHT, MG .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS II, 1979, 75 :790-798
[9]   GROUND-STATES OF MOLECULES .38. MNDO METHOD - APPROXIMATIONS AND PARAMETERS [J].
DEWAR, MJS ;
THIEL, W .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1977, 99 (15) :4899-4907
[10]   THE DEVELOPMENT AND USE OF QUANTUM-MECHANICAL MOLECULAR-MODELS .76. AM1 - A NEW GENERAL-PURPOSE QUANTUM-MECHANICAL MOLECULAR-MODEL [J].
DEWAR, MJS ;
ZOEBISCH, EG ;
HEALY, EF ;
STEWART, JJP .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1985, 107 (13) :3902-3909