Development of picosecond IR-UV pump probe spectroscopy for molecular clusters

分子簇皮秒红外-紫外泵浦探针光谱学的发展

• 批准号: 10440165
• 负责人: EBATA Takayuki
• 金额: $ 8.38万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10440165/
• 关键词: Hydrogen-bond; Supersonic beam; Picosecond laser; Infrared; Double resonance; Vibrational relaxation; 赤外-紫外二重共鳴分光; 赤外分光; 二重共鳴; 分子クラスター

An experimental setup for the picosecond IR-UV double resonance spectroscopy has been constructed. The setup was developed to study the vibrational relaxation of molecular clusters formed in a supersonic beam. The setup consists of a mode-locked picosecond Nd:YAG laser and an opto-parametric system. A fundamental of the Nd:YAG laser is converted to 3 μm by OPG with the use of nonlinear crystal, which is used to pump the clusters to the CH or OH stretching vibration. A picosecond tunable UV light was also generated by the OPG system, which is used to monitor the vibratinally excited clusters by resonant enhance ionization. The two laser pulses were irradiated to the clusters in the supersonic beam. By changing the delay time between the IR and the UV pulses, the time profiles of the vibratinally excited states were monitored. It was found that the OH stretching vibration of phenol is 15 picoseconds and those its clusters are much faster.

已经构建了针对皮秒IR-UV双共振光谱的实验设置。开发了该设置是为了研究超音速束中形成的分子簇的振动松弛。该设置由模式锁定的picsecond nd：yag激光器和一个选择参数系统组成。使用非线性晶体将ND：YAG激光器的基础转换为3μM，该晶体用于将簇泵送到CH或OH伸展振动。 OPG系统还生成了Picsecond可调的紫外线，该系统用于通过共振剂增强电离监测振动式激发的簇。将两个激光脉冲照射到超音速束中的簇。通过更改IR和UV脉冲之间的延迟时间，监测了颤动激发态的时间曲线。发现苯酚的OH拉伸振动是15秒，其簇的速度要快得多。

项目成果

Akira Mitsuzuka: "Infrared spectroscopy of intramolecular hydrogen-bonded OH stretching vibrations in jet-cooled methyl salicylate and its cluster"J.Chem.Phys.. A102. 9779-8784 (1998)

Akira Mitsuzuka：“喷射冷却水杨酸甲酯及其簇中分子内氢键 OH 伸缩振动的红外光谱”J.Chem.Phys.. A102。

Takayuki Ebata: "Mode-dependent anharmonic coupling between OH stretching and intermolecular vibrations of the hydrogen-bonded clusters of phenol" Chem.Phys.231(2,3). 199-204 (1998)

Takayuki Ebata：“苯酚氢键簇的 OH 伸缩和分子间振动之间的模式相关非和谐耦合”Chem.Phys.231(2,3)。

T. Ebata, K. Saito, H. Ishikawa, and N. Mikami: "Discrimination of s-cis/s-trans conformers of jet-cooled methyl cinnamate by population labeling spectroscopy"Res. Chem. Intermediates. 24(8). 803-812 (1998)

T. Ebata、K. Saito、H. Ishikawa 和 N. Mikami：“通过群体标记光谱法区分喷射冷却肉桂酸甲酯的 s-cis/s-trans 构象异构体”Res。

Seiichi Ishikawa: "Structures and vibrational relaxations of size-selected benzonitrile-(H_2O)_<n=1-3> and-(CH_3OH)_<n=1-3> clusters studied by fluorescence detected Raman and infrared spectroscopies" J.Chem.Phys.(in press). (1999)

Seiichi Ishikawa：“通过荧光检测拉曼和红外光谱研究尺寸选择的苯甲腈-(H_2O)_<n=1-3> 和-(CH_3OH)_<n=1-3> 簇的结构和振动弛豫”J.

Y. Matsuda, T. Ebata, and N. Mikami: "Vibrational spectroscopy of 2-pyridone and its clusters in supersonic jets : Structures of the clusters as revealed by characteristic shifts of the NH and C=0 bands"J. Chem. Phys.. 110(17). 8397-8407 (1999)

Y. Matsuda、T. Ebata 和 N. Mikami：“超音速射流中 2-吡啶酮及其簇的振动光谱：NH 和 C=0 谱带的特征位移揭示了簇的结构”J。