1,10-Phenanthroline Adsorption on Iron Electrode Monitored by Surface-Enhanced Raman Scattering (SERS). Comparison to SERS of Phen and Its Transition Metal Complex on Silver Electrode
1,10-Phenanthroline Adsorption on Iron Electrode Monitored by Surface-Enhanced Raman Scattering (SERS). Comparison to SERS of Phen and Its Transition Metal Complex on Silver Electrode
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DOI：
10.1021/jp072383u
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发表时间：
2007-08
影响因子：
3.7
通讯作者：
Gustavo F. S. Andrade;M. Temperini
中科院分区：
文献类型：
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作者：
Gustavo F. S. Andrade;M. Temperini
本文报道了在632.8和514.5nm激发波长下，在氯化物介质中，吸附在铁电极上的1，10-邻菲咯啉（phen）的表面增强共振谱（SER）随外加电位的变化。同时给出了邻菲咯啉在Co和Ni电极上632.8nm处的表面Sers光谱。表面络合物的SER特征表明其与化学制备的[M（phen）3]2+（其中M = Fe 2+、Co 2+或Ni 2+）相似。phen在过渡金属电极上和[M（phen）3]2+在银电极上的谱带相对强度随电位的变化规律相同。这些光谱变化在632.8 nm的激发辐射类似的共振拉曼光谱中的[M（phen）3] Cl 2在不同的激发激光线的光谱变化。在最大强度电位处，phen在Ag SER谱上的最强带为约100 nm。70倍，而phen对Fe的SER激发曲线约为1.54。5倍于phen对Ag的吸附。在632.8nm的辐射下，Fe上的邻菲咯啉在557 cm-1处的吸收峰显示出较强的吸收.
The SER spectra of 1,10-phenanthroline (phen) adsorbed on Fe electrode in chloride medium as a function of applied potentials at 632.8 and 514.5 nm excitation wavelengths are presented. SERS spectra of phen on Co and Ni electrodes at 632.8 nm are also shown. The SER signatures of the surface complex indicate its similarity with the chemically prepared [M(phen)3]2+, where M = Fe2+, Co2+, or Ni2+. The same changes in relative intensities of the bands with applied potential are observed for phen on transition metals and for [M(phen)3]2+ on silver electrodes. These spectral changes at 632.8 nm excitation radiation resemble the spectral changes in the resonance Raman spectra of [M(phen)3]Cl2 at different excitation laser lines. At the potential of maximum intensity, the strongest band in phen on Ag SER spectrum is ca. 70 times higher than that in phen on Fe, while the phen on Fe SER excitation profile is ca. 5 times higher than that of phen on Ag. At 632.8 nm radiation, the band at 557 cm-1 for phen on Fe show...