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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Kinetic Energy Release Distributions in the Dissociation of Energy-Selected Fluoroethene and 1,1-Difluoroethene Ions
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Kinetic Energy Release Distributions in the Dissociation of Energy-Selected Fluoroethene and 1,1-Difluoroethene Ions

机译:能量选择的氟乙烯和1,1-二氟乙烯离子解离中的动能释放分布

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摘要

The unimolecular dissociation of energy-selected fluoroethene and 1,1-difluoroetheneions has been investigated by the threshold photoelectron photoion coincidence (TPEPICO) technique. The breakdown diagrams of the 1,1-difluoroethene and fluoroethene have been recorded in the range 13-22 eV. From the time-of-flight spectra, complete distributions of the kinetic energy released (KERDP) in the dissociation of these energy-selected ions have been derived. For the HF loss reaction channel, the KERD peaks at about 200 Lev for low excitation energies but becomes thermal at higher excitation energies. For the F loss channel, the KERD peaks at zero kinetic energy for low excitation energy but at about 200 meV for high excitation energy. The analysis of the KERD provides evidence that consecutive fragmentation takes place for 1,1-difluoroethene at energies above 19 eV.
机译:能量选择的氟乙烯和1,1-二氟乙烯的单分子解离已通过阈值光电子光子重合(TPEPICO)技术进行了研究。 1,1-二氟乙烯和氟乙烯的分解图记录在13-22 eV范围内。从飞行时间光谱中,可以得出在这些能量选择离子的离解中释放的动能(KERDP)的完整分布。对于HF损失反应通道,对于低激发能,KERD在约200 Lev处达到峰值,但在较高激发能时变为热态。对于F损耗通道,KERD在低动能时为零,对于低激发能为峰值,但在约200 meV时为高激发能。 KERD的分析提供了证据,证明在能量高于19 eV时1,1-二氟乙烯会发生连续断裂。

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