Laser photoelectron spectroscopy and dynamics of S1 p-fluorotoluene
Laser photoelectron spectroscopy and dynamics of S1 p-fluorotoluene
复制标题
S1对氟甲苯的激光光电子能谱和动力学
DOI：
10.1021/jp030341
复制
发表时间：
2003
影响因子：
2.9
通讯作者：
K. L. Reid
中科院分区：
文献类型：
--
作者：
S. Bellm;Paul T. Whiteside;K. L. Reid
本文报道了S 1-对氟甲苯的10个振动态的激光光电子能谱。对于8个振动态(高达∼850 cm-1的过剩能量)，用纳秒激光脉冲激发和电离产生具有良好分辨振动峰的光电子光谱。对于另外两个态(>；1100 cm~(-1)过剩能量)，当使用纳秒脉冲时，由于分子内动力学的原因，光电子谱显示结构损失，但当使用重叠的皮秒脉冲时，这种结构被恢复。在所有情况下，都指定了光电子光谱中的振动峰，并用这些光谱来推导出离子中12个振动模的频率。
Laser photoelectron spectra have been obtained following the preparation of 10 vibrational states in S 1 p-fluorotoluene. For eight of the vibrational states (up to ∼850 cm - 1 excess energy), excitation and ionization with nanosecond laser pulses gives rise to photoelectron spectra with well-resolved vibrational peaks. For the other two states (>1100 cm - 1 excess energy), the photoelectron spectra show a loss of structure when nanosecond pulses are used, as a result of intramolecular dynamics, but this structure is recovered when overlapped picosecond pulses are used. In all cases the vibrational peaks in the photoelectron spectra are assigned, and the spectra are used to deduce the frequencies of 12 vibrational modes in the ion.