| 粗糙银电极上高铁血红素的非共振表面增强拉曼光谱研究 |
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| 引用本文： | 郑军伟,李晓伟,徐浩元,周耀国,顾仁敖.粗糙银电极上高铁血红素的非共振表面增强拉曼光谱研究[J].光谱学与光谱分析,2003,23(2):294-296. |
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| 作者姓名： | 郑军伟 李晓伟 徐浩元 周耀国 顾仁敖 |
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| 作者单位： | 苏州大学化学系,江苏,苏州,215006 |
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| 基金项目： | 国家自然科学基金(20073028) |
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| 摘 要： | 以632.8nm为激发线,研究了高铁血红素的非共振表面增强拉曼光谱。结果表明,高铁血红素的氧化和还原状态的拉曼谱图以B_(1g)振动模式为主;血红素以丙酸侧基直接吸附于电极表面,叶啉环则以垂直于电极表面的形式存在。B_(1g)振动模式v_(15)对血红素中心铁的氧化还原状态十分敏感,被指认为非共振条件下血红素氧化还原状态的特征谱峰。
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| 关 键 词： | 表面增强拉曼光谱 非共振拉曼光谱 高铁血红素 电化学 银电极 |
| 文章编号： | 1000-0593(2003)02-0294-03 |
| 修稿时间： | 2002年3月12日 |
A Non-resonance Surface-enhanced Raman Spectroscopic Study of Hemin on a Roughened Silver Electrode |
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| ZHENG Jun-wei,LI Xiaowei,XU Haoyuan,ZHOU Yaoguo and GU Ren-ao.A Non-resonance Surface-enhanced Raman Spectroscopic Study of Hemin on a Roughened Silver Electrode[J].Spectroscopy and Spectral Analysis,2003,23(2):294-296. |
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| Authors: | ZHENG Jun-wei LI Xiaowei XU Haoyuan ZHOU Yaoguo and GU Ren-ao |
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| Institution: | Department of Chemistry, Suzhou University, Suzhou 215006, China. |
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| Abstract: | The non-resonance Raman spectra of hemin were studied with the excitation of a 632.8 nm laser. The results indicated that the spectra of oxidized and reduced hemin are dominated by B1g vibration modes. The SERS spectral feature demonstrates that the por-phyrin plane is perpendicular to the electrode surface. Moreover, the enhancement of the bands related to propionic acid substituents indicates that hemin is attached to the electrode surface ma propionic acid substituents. The dependence of the SERS spectra on the electrode potential was examined. One of the B1g modes, v15, was found to be highly sensitive to the oxidation state of the central iron in heme group, and thereby exclusively assigned to be the oxidation state marker band for heme iron. |
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| Keywords: | Surface-enhanced Raman spectroscopy Non-resonance Raman spectroscopy Hemin Electrochemistry Silver electrode |
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