引用本文:
高义德, 胡长进, 金瑾, 陈旸, 陈从香. CCl2(A 1B 1,a3B1)自由基被烷烃类分子猝灭动力学[J]. 物理化学学报,
2001, 17(06): 516-520.
doi:
10.3866/PKU.WHXB20010609
Citation: Gao Yi-De, Hu Chang-Jin, Jin Jin, Chen Yang, Chen Cong-Xiang. Kinetic Studies on Quenching of CCl2(A 1B 1,a3B1) by Alkanes[J]. Acta Physico-Chimica Sinica, 2001, 17(06): 516-520. doi: 10.3866/PKU.WHXB20010609
Citation: Gao Yi-De, Hu Chang-Jin, Jin Jin, Chen Yang, Chen Cong-Xiang. Kinetic Studies on Quenching of CCl2(A 1B 1,a3B1) by Alkanes[J]. Acta Physico-Chimica Sinica, 2001, 17(06): 516-520. doi: 10.3866/PKU.WHXB20010609
CCl2(A 1B 1,a3B1)自由基被烷烃类分子猝灭动力学
摘要:
用放电LIF实验装置,对CCl4/Ar混合气体放电产生CCl2自由基,再用541.52 nm激光将电子基态CCl2激励到激发态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)被烷烃类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CCl2(A 1B1)态和CCl2(a 3B1)态的碰撞猝灭速率常数kA和ka值.
English
Kinetic Studies on Quenching of CCl2(A 1B 1,a3B1) by Alkanes
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 alkanes were obtained by observing time resolved fluorescence from the excited CCl2 radicals transition,which showed a superposition of two exponential decay components.The stateresolved rate constants kA and ka were first time acquired by analyzing and treating these data by using threelevelmodel,which was put forward by us.kA and ka increase on the whole with increasing the number of C－H bonds in alkanes.
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