Surface-enhanced Raman scattering of 2,3-dimethylpyrazine adsorbed on silver electrode:: selective enhancement explained through the charge transfer mechanism

被引：10

作者：

Arenas, JF ^{[1
]}

Centeno, SP ^{[1
]}

López-Tocón, I ^{[1
]}

Otero, JC ^{[1
]}

机构：

[1] Univ Malaga, Fac Sci, Dept Chem Phys, E-29071 Malaga, Spain

来源：

VIBRATIONAL SPECTROSCOPY | 2004年 / 35卷 / 1-2期

关键词：

charge transfer; SERS; 2,3-dimethylpyrazine; Raman;

D O I：

10.1016/j.vibspec.2003.11.012

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The surface-enhanced Raman spectra (SERS) of 2,3-dimethylpyrazine adsorbed on silver have been recorded at different electrode potentials. The main feature of the SERS spectra is the selective enhancement of the vibration 8a, while the remaining vibrations do not undergo any noticeable enhancement. This behavior has been explained according to a photoinduced charge transfer mechanism between the metal and the adsorbate, involving the ground electronic states of the neutral molecule (S-0 state) and the radical anion (D-0 state), given that the incoming photon induces the transfer of an electron from the Fermi level of the metal to vacant orbitals of the adsorbate. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：39 / 44

页数：6

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