| 苯甲酸及其甲基取代物的激光光解研究 |
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| 引用本文： | 赵红卫,王文锋,姚思德.苯甲酸及其甲基取代物的激光光解研究[J].光谱学与光谱分析,2006,26(11):1969-1972. |
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| 作者姓名： | 赵红卫 王文锋 姚思德 |
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| 作者单位： | 中国科学院上海应用物理研究所,上海,201800 |
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| 基金项目： | 国家自然科学基金
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中国科学院前沿领域资助项目 |
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| 摘 要： | 研究了苯甲酸及其甲基取代物在248 nm激光作用下的光电离及光激发行为,测定了光电离量子产额和激发三线态寿命及其自猝灭速率常数.实验结果显示甲基在苯环不同位置的取代对苯甲酸化合物激发三线态的影响不明显.利用分步双激光技术对苯甲酸激发态进行共振激发,对可能生成的瞬态产物进行了初步探讨.
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| 关 键 词： | 苯甲酸 瞬态吸收光谱 激发态 激光光解 分步双激光 |
| 文章编号： | 1000-0593（2006）11-1969-04 |
| 收稿时间： | 2005-08-12 |
| 修稿时间： | 2005-12-26 |
Studies of Benzoic Acid and Its Methyl Substitutes by Using Laser Flash Photolysis |
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| ZHAO Hong-wei,WANG Wen-feng,YAO Si-de.Studies of Benzoic Acid and Its Methyl Substitutes by Using Laser Flash Photolysis[J].Spectroscopy and Spectral Analysis,2006,26(11):1969-1972. |
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| Authors: | ZHAO Hong-wei WANG Wen-feng YAO Si-de |
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| Institution: | Shanghai Institute of Applicd Physics, Chinese Academy of Sciences, Shanghai 201800, China |
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| Abstract: | In the present paper the photo-ionization and properties of excited state of benzoic acid and its methyl substitutes were studied using 248 nm laser flash photolysis.The quantum yields of hydrated electrons produced from photo-ionization,the life-time of excited triplet,and the self quenching rate constants were also determined.It is shown that there isn't significant effect of different position of methyl residue at benzene ring on its excited triplet.The resonant excitation of triplet of benzoic acid was(explored) by the use of two-steps laser flash photolysis.The possible upper excited state and radical involved in the processes were guessed. |
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| Keywords: | Benzoic acid Transient absorption spectra Excited state Laser flash photolysis Two-steps laser flash photolysis |
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