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The Measurements of Quenching Rate Constants of CCI2 (A1B1and a3B1) by Ketones
Gao Yide,Jin Jin,Liu Yunzhen,Zhang Limin,Chen Yang,Chen Congxiang
Author NameAffiliation
Gao Yide Open Laboratory for Bond-selective Chemistry, Chinese Academy of Science,Department of Chemical Physics, University of Science and Technology of China, Hefei 230026) 
Jin Jin Open Laboratory for Bond-selective Chemistry, Chinese Academy of Science,Department of Chemical Physics, University of Science and Technology of China, Hefei 230026) 
Liu Yunzhen Open Laboratory for Bond-selective Chemistry, Chinese Academy of Science,Department of Chemical Physics, University of Science and Technology of China, Hefei 230026) 
Zhang Limin Open Laboratory for Bond-selective Chemistry, Chinese Academy of Science,Department of Chemical Physics, University of Science and Technology of China, Hefei 230026) 
Chen Yang Open Laboratory for Bond-selective Chemistry, Chinese Academy of Science,Department of Chemical Physics, University of Science and Technology of China, Hefei 230026) 
Chen Congxiang Open Laboratory for Bond-selective Chemistry, Chinese Academy of Science,Department of Chemical Physics, University of Science and Technology of China, Hefei 230026) 
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.
Key words:  CCl2( A1B1, a3B1), Ketones, Kinetics, Quenching rate constant, Three-level model
FundProject: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
CCl2(A1B1和a3B1)被酮类分子猝灭速率常数的测定
高义德,金瑾,刘云珍,张立敏,陈晻,陈从香
摘要:
对CCl4/Ar混合气体脉冲直流高压放电产生CCl2自由基,经过约110μs后,再用541.52mm激光将电子基态CC2激励到激发态A1B1(0,4,0)振动态K=0能级上,通过检测激发态CCl2(A)时间分辨荧光信号,测得室温下CC2(A1B1和a3B1)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Ka值.
关键词:  CCl2(A1B1,a3B1)  酮类分子  动力学  猝灭速率常数  三能级模型
DOI:10.1088/1674-0068/14/3/257-262
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