| CCl2(A1B1)被O2及取代甲烷类分子猝灭的动力学研究 |
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| 引用本文： | 高义德,胡长进,陈旸,戴静华,陈从香.CCl2(A1B1)被O2及取代甲烷类分子猝灭的动力学研究[J].高等学校化学学报,2002,23(5):906-909. |
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| 作者姓名： | 高义德 胡长进 陈旸 戴静华 陈从香 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金，中国科学院资助项目，国家重点基础研究发展计划(973计划)，10032050，HH030301，G1999075304，，， |
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| 摘 要： | 对CCl4／Ar混合气体放电产生CCl2自由基，再用541.52nm激光将电子基态CCl2激发到激发态A^1B1（0，4，0）振动态k=0能级上，通过检测 激发态CCl2时间分辨荧光信号，测得室温下CCl2(A^1B1)被O2，CF4，CF2Cl，CH3NO2，CH2Br2等分子猝灭的实验结果，用改进的三能级模型分析处理实验数据，获得态分辨速常数KA和Ka值，并对实验结果进行了讨论。
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| 关 键 词： | 动力学 猝灭速率常数 取代甲烷分子 氧分子 CCl2自由基 二氯卡宾 |
| 文章编号： | 0251-0790(2002)05-0906-04 |
Kinetics Studies on Quenching of CCl2(A1B1 and a3B1) by O2, CF4,CF2Cl2, CH3NO2, CH2Br2 and Chloromethane |
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| GAO Yi-De,HU Chang-Jin,CHEN Yang,DAI Jing-Hua,CHEN Cong-Xiang.Kinetics Studies on Quenching of CCl2(A1B1 and a3B1) by O2, CF4,CF2Cl2, CH3NO2, CH2Br2 and Chloromethane[J].Chemical Research In Chinese Universities,2002,23(5):906-909. |
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| Authors: | GAO Yi-De HU Chang-Jin CHEN Yang DAI Jing-Hua CHEN Cong-Xiang |
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| Institution: | GAO Yi-De,HU Chang-Jin,CHEN Yang,DAI Jing-Hua,CHEN Cong-Xiang* |
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| Abstract: | Abstract CCl2 free radicals were produced by dc discharge of CCl4(in Ar). Ground electronic state CCl2 radical was electronically excited to A1B1(0,4.0) state k=0 level with Nd YAG laser pumped dye laser at 541. 52 nm. Experimental quenching data of CClz(.A1B1 and a3B1) by O2, CF4, CF2Cl2, CH3NO2, CH2Br2 and chloromethane were obtained by observing time resolved fluorescence from the excited CC12 radicals transition, which showed a superposition of two exponential decay components. The state-resolved rate constants KA and Ka were acquired by analyzing and dealing with these data by using a three-level-model. |
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| Keywords: | CCl2(AlB1 a3B1) Kinetics Quenching rate constant Substituted methane |
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