Rotational Isomers as Studied by Electronic Spectra

电子光谱研究的旋转异构体

• 批准号: 60430004
• 负责人: ITO Mitsuo
• 金额: $ 10.88万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60430004/
• 关键词: rotational isomer; electronic spectra; supersonic jet; レーザ分子分光; 回転異性体; 選択的反応性; レーザー分子分光; パラージメトオキシベンゼン; 超音速ジェット; レーザー分子分光法

The rotational isomers of several o- and m-substituted phenolos have been studied by using various electronic spectroscopies combined with the supersonic jet technique. It was found that the rotational isomers arising from the orientation of the OH group are easily identified by their electronic excitation energies. The ionization potentials of the individual rotational isomers were accurately determined by two-color ionization threshold spectroscopy. The ionization potentials of the different rotational isomers of the molecule studied show a great difference as large as 200 cm^<-1>, which suggests the possibility of separation of the rotational isomer by the ionization method. It was also found from the electronic spectra in supersonic jets that the rotational isomer selectively forms the complexes with particular solvent molecules. The large amplitude motion and intramolecular hydrogen bonding in the rotational isomer were also studied in detail.

通过使用各种电子光谱与超音速喷射技术相结合，研究了几种邻位和间位取代酚的旋转异构体。研究发现，由于 OH 基团的取向而产生的旋转异构体很容易通过其电子激发能来识别。通过双色电离阈值光谱准确测定各个旋转异构体的电离电位。所研究的分子的不同旋转异构体的电离势显示出高达200cm^-1的巨大差异，这表明通过电离方法分离旋转异构体的可能性。从超音速射流中的电子光谱还发现，旋转异构体选择性地与特定溶剂分子形成络合物。还详细研究了旋转异构体中的大幅运动和分子内氢键。

项目成果

Toshinori Suzuki: The Journal of Physical Chemistry. 90. 6431-6440 (1986)

铃木敏德：《物理化学杂志》。

Seiji Yamamoto: "Selective Complexation of Rotational Isomers of p-Dimethoxybenzene as Studied by Electronic Spectra in a Supersonic Jet" Chemical Physics Letters. 125. 1-4 (1986)

Seiji Yamamoto：“通过超音速射流中的电子光谱研究对二甲氧基苯旋转异构体的选择性络合”化学物理快报。

Akira Goto: The Journal of Physical Chemistry. 90. 2370-2374 (1986)

后藤晃：《物理化学杂志》。

Mitsuo Ito: Vibrational Spectra and Structure (Edited by J. R. Durig). Elsevier, 516 (1986)

Mitsuo Ito：振动光谱和结构（J. R. Durig 编辑）。

Chem.Phys.Letter. 116-1. (1985)

化学物理快报。