Autoionization-Detected Infrared Spectroscopy of Molecular Ions
Autoionization-Detected Infrared Spectroscopy of Molecular Ions
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分子离子的自电离检测红外光谱
DOI：
10.1021/jp971592j
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发表时间：
1997
影响因子：
2.9
通讯作者：
N. Mikami
中科院分区：
文献类型：
--
作者：
A. Fujii;A. Iwasaki;T. Ebata;N. Mikami
本文提出了一种新的冷分子离子红外光谱分析方法，并介绍了该方法在苯酚离子红外光谱分析中的应用。用双色双共振激发制备了收敛到第一电离阈值的很高的里德堡态。里德堡态的离子核的振动激发诱导自电离，导致分子离子。通过监测作为振动激发激光频率的函数的离子电流来获得红外光谱。观察到的光谱实际上提供了裸离子的振动频率。
A new method for infrared spectroscopy of cold molecular ions is proposed, and its application to the phenol ion is presented. Very high Rydberg states converging to the first ionization threshold are prepared by two-color double-resonance excitation. Vibrational excitation of the ion core of the Rydberg states induces autoionization, leading to the molecular ion. An infrared spectrum is obtained by monitoring the ion current as a function of the vibrational excitation laser frequency. The observed spectrum practically provides the vibrational frequency of the bare ion.