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Mass-analyzed Threshold Ionization Spectroscopy of Rotamers of p-ethoxyphenol Cations and Configuration Effect
Qiu-sha Zheng1,2,3, Teng I Fang1, Bing Zhang2, Wen Bih Tzeng*1
1.Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106;2.State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;3.Graduate Scho
Abstract:
Two-color resonant two-photon mass-analyzed threshold ionization (MATI) spectroscopy was used to record the vibrationally resolved cation spectra of the selected rotamers of pethoxyphenol. The adiabatic ionization energies of the trans and cis rotamers are determined to be 61565±5 and 61670±5 cm-1, which are less than that of p-methoxyphenol by 645 and 643 cm-1, respectively. Analysis on the MATI spectra of the selected rotamers of pethoxyphenol cation shows that the relative orientation of the ethoxy group has little effect on the in-plane ring vibrations. The low-frequency OC2H5 bending vibrations appear to be active for both forms of the cation.
Key words:  Mass-analyzed threshold ionization spectroscopy, p-ethoxyphenol, Cation, Vi-bration
FundProject:
附件
Mass-analyzed Threshold Ionization Spectroscopy of Rotamers of p-ethoxyphenol Cations and Configuration Effect
郑秋莎1,2,3, 方腾毅1, 张冰2, 曾文碧*1
1.中央研究院原子与分子科学研究所,台北;2.中国科学院武汉物理与数学研究所,波谱与原子分子物理国家重点试验室,武汉430071;3.中国科学院研究生院,北京100049
摘要:
利用双色双光子质量分辨的阈值电离光谱技术,研究了对位乙氧基苯酚顺式和反式两种构型的离子态振动特性. 测得顺式和反式精确的绝热电离势分别为61565±5和61670±5 cm-1. 与对位甲氧基苯酚实验结果比较,顺式和反式的测得的绝热电离势分别降低了645和643 cm-1. 从所得到的两种构型的高分辨离子态光谱中,可知顺式和反式不同构型对苯环平面的振动影响很小,而低频率的C-OC2H5弯曲振动在两种构型中都很活跃.
关键词:  质量分辨的阈值电离光谱,对位乙氧基苯酚,离子态,振动
DOI:10.1088/1674-0068/22/06/649-654
分类号: