| CCl2(A1B1和a3B1)被酮类分子猝灭速率常数的测定 |
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| 引用本文： | 高义德,金瑾,刘云珍,张立敏,陈晻,陈从香. CCl2(A1B1和a3B1)被酮类分子猝灭速率常数的测定[J]. 化学物理学报, 2001, 14(3): 257-262 |
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| 作者姓名： | 高义德 金瑾 刘云珍 张立敏 陈晻 陈从香 |
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| 作者单位： | [1]中国科学院选键化学开放实验室,中国科学技术大学化学物理系,合肥230026 [2]中国科学院选键化学开放实验室,中 |
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| 基金项目： | 国家自然科学基金(299730380)、中国科学院重大项目(HH030301)和国家重点基础研究专项基金(G1999075304)资助项目 |
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| 摘 要： | 对CCI4／Ar混合气体脉冲直流高压放电产生CCI2自由基，经过约110μs后，再用541．52nm激光将电子基态CCI2激励到激发态A^1B1(0,4,0)振动态K＝0级以上，通过检测激发态CCI2（A）时间分辨荧光信号，测得室温下CCI2（A^1B1和a^3B1)被酮类分子猝灭的实验结果，用所提出的三能级模型分析处理实验数据，获得态分辨速率常数KA和Kα值。
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| 关 键 词： | 酮类分子 动力学 猝灭速率常数 三能级模型 CCI2自由基 |
| 收稿时间： | 2000-12-07 |
The Measurements of Quenching Rate Constants of CCI2 (A1B1and a3B1) by Ketones |
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| Gao Yide,Jin Jin,Liu Yunzhen,Zhang Limin,Chen Yang and Chen Congxiang. The Measurements of Quenching Rate Constants of CCI2 (A1B1and a3B1) by Ketones[J]. Chinese Journal of Chemical Physics, 2001, 14(3): 257-262 |
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| Authors: | Gao Yide Jin Jin Liu Yunzhen Zhang Limin Chen Yang Chen Congxiang |
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| Abstract: | CCl2free radicals were produced by dc discharge of CCl4(in Ar). Ground electronic state CCl2radical was electronically excited to A1B1(0,4,0) state with Nd:YAG laser pumpeddye laser at 541.52nm. Experimental quenching data of CCl2(A1B1and a3B1) by several ketones were obtained through observing time resolved fluorescence signal of the excited CCl2radicals, which showed a superposition of two exponential decay components. The state-resolved rate constantsKAandKawere first time acquired by analyzing and dealing with these data by using three-level-model, which was put forward by us.KAandKaincrease on the whole with increasing the number of C-H bonds in ketones. |
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| Keywords: | CCl2( A1B1 a3B1) Ketones Kinetics Quenching rate constant Three-level model |
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