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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Observation of Rotational Isomers I:A ZEKE and Hole-Burining SPectroscoy Study of 3-Methoxyphenol
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Observation of Rotational Isomers I:A ZEKE and Hole-Burining SPectroscoy Study of 3-Methoxyphenol

机译:旋转异构体I:A ZEKE的观察和烧孔光谱学研究3-甲氧基苯酚

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摘要

Three rotational isomers of 3-methoxyphenol have been studied using two-color resonance-enhanced multiphoton ionization (REMPI) and zero kinetic energy (ZEKE) photoelectron spectroscopy. Hole-burning spectroscopy was employed to confirm the presence of three isomers in the REMPI spectrum (Si band origins were identified at 35 974, 36 034 and 36202 d 1 cm’ for isomers I, LV, and III, respectively). ZEKE spectra recorded via the S~ states of the isomers provide adiabatic ionization energies of 65 228, 64 741, and 65 648 ± 5 cm’, respectively. The isomers are assigned with the aid of HF/cc-pVDZ, MP2/cc-pVDZ, and B3LYPIcc-pVDZ ab initio and density functional theory calculations. We discuss the characteristics of the 3-methoxyphenol rotational isomers by comparing the REMPI and ZEKE spectra with those of other substituted benztnes.
机译:使用双色共振增强多光子电离(REMPI)和零动能(ZEKE)光电子能谱研究了3-甲氧基苯酚的三种旋转异构体。用空穴燃烧光谱法确定了REMPI谱中三种异构体的存在(异构体I,LV和III的Si谱带起源分别定为35 974、36034和36202 d 1 cm')。通过异构体的S〜态记录的ZEKE光谱分别提供了65 228、64 741和65 648±5 cm'的绝热电离能。借助HF / cc-pVDZ,MP2 / cc-pVDZ和B3LYPIcc-pVDZ从头算和密度泛函理论计算来分配异构体。我们通过比较REMPI和ZEKE光谱与其他取代的苯甲酮的光谱,讨论了3-甲氧基苯酚旋转异构体的特征。

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