| 酪氨酸光电离过程的激光闪光光谱研究:pH效应 |
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| 引用本文： | 宋钦华,孙海虹,李全新,徐业平,陈从香,俞书勤,马兴孝,王文锋,姚思德.酪氨酸光电离过程的激光闪光光谱研究:pH效应[J].光谱学与光谱分析,1999,19(5):659-661. |
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| 作者姓名： | 宋钦华 孙海虹 李全新 徐业平 陈从香 俞书勤 马兴孝 王文锋 姚思德 |
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| 作者单位： | 1. 中国科学技术大学化学物理系,230026,合肥
2. 中国科学院上海原子核研究所,辐射化学开放实验室,201800,上海 |
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| 摘 要： | 运用２４８ｎｍ激光闪光光解瞬态吸收光谱研究了不同ｐＨ值水溶液中酪氨酸光解过程，结果表明，溶液ｐＨ值影响酪氨酸的光电离过程；ｐＨ值增大，通过单光子途径的分子增多，而通过双光子途径的分子减少，反之则反。进一步阐明，酪氨酸光电离的ｐＨ效应源于其酚羟基的电离。
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| 关 键 词： | 激光闪光光谱 酪氨酸 光电离过程 pH效应 |
Study on Laser Flash Spectroscopy of Processes of Photoionization of Tyrosine:pH Effects |
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| Qinhua SONG,Haihong SUN,Quanxin LI,Yeping XU,Congxiang CHEN,Shuqin YU,Xingxiao MA,Wenfeng WANG,Side YAO.Study on Laser Flash Spectroscopy of Processes of Photoionization of Tyrosine:pH Effects[J].Spectroscopy and Spectral Analysis,1999,19(5):659-661. |
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| Authors: | Qinhua SONG Haihong SUN Quanxin LI Yeping XU Congxiang CHEN Shuqin YU Xingxiao MA Wenfeng WANG Side YAO |
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| Institution: | Department of Chemical Physics, University of Science and Technology of China, 230026 Hefei. |
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| Abstract: | The processes of photoionization of tyrosine on three different pH value solutions were investigated by 248 nm laser flash photolysis.The results showed that the processes of photoionization of tyrosine were affected by pH value of the solution.With pH value increasing,the molecule number of photoionization increases via a monophotonic process,and decreases via a biphotonic process.Furthermore,the pH effect of photoionization of tyrosine resulting from deprotonation of phenolic hydroxyl group in alkaline solution was demonstrated. |
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| Keywords: | Laser flash spectroscopy Tyrosine Process of photoionization pH effect |
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