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首页> 外文期刊>The Journal of Chemical Physics >Photodissociation dynamics of 1,1-difluoroethylene at 157 nm excitation
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Photodissociation dynamics of 1,1-difluoroethylene at 157 nm excitation

机译：1,1-二氟乙烯在157 nm激发下的光解离动力学

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摘要

Photodissociation of 1,1-difluoroethylene (F2CCH2) at 157 nm has been investigated using photofragment translational spectroscopy. Five dissociation channels have been experimentally observed; molecular HF elimination, H atom elimination, molecular hydrogen (H-2) elimination, F atom elimination, and double bond breaking. Molecular HF elimination and Ii atom elimination channels are found to be the two major dissociation pathways in photodissociation of F2CCH2 at 157 nm excitation. Molecular hydrogen (H-2) elimination and double bond cleavage are also significant, while F atom elimination is a minor process. Product translational energy distributions for all dissociation channels have also been measured. All translational energy releases are peaked at energies away from zero, indicating that the dissociation of F2CCH2 at 157 nm excitation most likely occurs with exit barriers on the ground electronic potential surface through internal conversion from the initially excited electronic state. Branching ratios and averaged energy partitions for different channels have also been estimated. (C) 1998 American Institute of Physics. [S0021-9606(98)00948-9]. [References: 23]
机译：已经使用光碎裂平移光谱法研究了1,1-二氟乙烯（F2CCH2）在157 nm处的光解离。通过实验观察到了五个解离通道。分子HF消除，H原子消除，分子氢（H-2）消除，F原子消除和双键断裂。发现分子HF消除和Ii原子消除通道是F2CCH2在157 nm激发下光解离的两个主要解离途径。分子氢（H-2）的消除和双键裂解也很重要，而F原子的消除是一个较小的过程。还测量了所有解离通道的产物平移能量分布。所有的平移能量释放都在远离零的能量处达到峰值，这表明F2CCH2在157 nm激发下的解离很可能是通过从最初激发的电子态的内部转换在地电势表面上的出口势垒而发生的。还估计了不同通道的分支比和平均能量分配。 （C）1998美国物理研究所。 [S0021-9606（98）00948-9]。 [参考：23]

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