引用本文:
高义德, 刘云珍, 冉琴, 陈从香. CCl2自由基被无机小分子猝灭的速率常数[J]. 物理化学学报,
2001, 17(10): 944-947.
doi:
10.3866/PKU.WHXB20011016
Citation: Gao Yi-De, Liu Yun-Zhen, Ran Qin, Chen Cong-Xiang. Measurements of Quenching Rate Constants of CCl2(A 1B1 and a 3B 1) by Some Inorganic Molecules[J]. Acta Physico-Chimica Sinica, 2001, 17(10): 944-947. doi: 10.3866/PKU.WHXB20011016
Citation: Gao Yi-De, Liu Yun-Zhen, Ran Qin, Chen Cong-Xiang. Measurements of Quenching Rate Constants of CCl2(A 1B1 and a 3B 1) by Some Inorganic Molecules[J]. Acta Physico-Chimica Sinica, 2001, 17(10): 944-947. doi: 10.3866/PKU.WHXB20011016
CCl2自由基被无机小分子猝灭的速率常数
摘要:
对CCl4/Ar混合气体脉冲直流高压放电产生CCl2自由基，用541.52 nm激光将电子基态CCl2激励到A 1B1(0,4,0)振动能级上. 通过检测激发态CCl2时间分辨荧光信号，测得室温下CCl2(A 1B1和a 3B1)被O2、N2、NO、 CO2、 CS2、H2O、SO2,和SF6分子猝灭的实验结果.用我们提出的三能级模型分析处理实验数据，获得了CCl2(A 1B1)态和CCl2(a 3B1)态的碰撞猝灭速率常数kA和ka值.
English
Measurements of Quenching Rate Constants of CCl2(A 1B1 and a 3B 1) by Some Inorganic Molecules
Abstract:
CCl2 free radicals were produced by dc discharge of CCl4(in Ar). Ground electronic state CCl2 radical was electronically excited to A 1B1 (0,4,0) state with Nd:YAG laser pumped dye laser at 541.52 nm. Experimental quenching data of CCl2 (A 1B1 and a 3B1) by O2,N2,NO,CO2,CS2,H2O,SO2 and SF6 were obtained by observing time resolved fluorescence from the excited CCl2 radicals,which showed a superposition of two exponential decay components. The stateresolved rate constants kA and ka were first time acquired by analyzing and dealing with these data by using a threelevelmodel proposed by us.
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