Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, USA.
J Phys Chem A. 2010 Mar 11;114(9):3114-20. doi: 10.1021/jp908491w.
(2 + 1) Resonance enhanced multiphoton ionization (REMPI) spectra were recorded for 2-butanone to study its photoionization dynamics. Two-photon excitation (53,200-55,000 cm(-1) and 57,000-59,500 cm(-1)) was used to prepare the molecule in the 3s and 3p Rydberg states, respectively. Vibrational transitions in the spectrum were assigned with the aid of ab initio calculations as well as photoelectron imaging results. Photoelectron imaging data in the 3s Rydberg region exhibits a vibrational progression in the CCOC deformation mode in the ionic state superimposed on an otherwise diagonal (delta v = 0) ionization. Photoelectron imaging data in the 3p Rydberg region shows 3p-3s Rydberg-Rydberg mixing. The ionization energy obtained directly from the 3p photoelectron imaging is 9.541 eV.
(2+1)共振增强多光子电离（REMPI）光谱被记录下来，用于研究 2-丁酮的光离动力学。双光子激发（53200-55000cm(-1) 和 57000-59500cm(-1)）分别用于将分子制备在 3s 和 3p 里德伯态中。借助从头算计算以及光电离成像结果对光谱中的振动跃迁进行了分配。3s 里德伯区域中的光电离成像数据显示，在离子态中，CCOC 变形模式上存在振动进展，叠加在其他情况下的对角（Δv=0）离化上。3p 里德伯区域中的光电离成像数据显示 3p-3s 里德伯-里德伯混合。直接从 3p 光电子成像获得的电离能为 9.541eV。
