Application of isomer-selected spectroscopy by ion-drift tube method to the intracluster reaction products

离子漂移管法异构体选择光谱在簇内反应产物中的应用

• 批准号: 15350003
• 负责人: MISAIZU Fuminori
• 金额: $ 9.47万
• 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: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15350003/
• 关键词: cluster; isomer; mass spectrometry; photodissociation; electronic states; quantum chemical calculation; ion; solvated metal cluster

We have succeeded in separating mass-selected carbon cluster ions with different isomer structures, by using a home-made mass-and isomer-separation and detection system developed recently. In this system, an ion-drift tube cell, which is filled with helium gas, were located inside a field-free region of a time-of-flight (TOF) mass spectrometer. Produced ions in a cluster source were injected into the cell after acceleration by static electric fields. Then the ions were guided through the cell by an electric field, colliding with the background He gas one after another. We can separate the ions with different structure in the cell, because the ion mobility in the cell depends on the geometrical cross-section of the ion. Along with the development of this system, we have investigated gas-phase complex systems which have more than one isomer structures with comparable energy. The following studies have been done in this project ; 1)photodissociation spectroscopy and dynamics of magnesium monocation with methyl halide, Mg^+-XCH_3, 2)photodissociation spectroscopy of sodium iodide cluster ions with alcohol adsorbate, 3)structure identification of intracluster polymerization products for the system including an alkali-metal atom with plural acrylonitrile molecules by photoionization mass spectrometry and by the observation of metastable, unimolecular dissociation reactions, and 4)multiphoton excitation and dissociation reaction mechanism and its pathways from boron nitride cluster ions, B_nN^+. From these studies, we have found several ways to identify each isomer structure from plural isomer systems by laser spectroscopy, along with the direct separation method using the ion-drift tube apparatus. More extensive studies of photodissociation dynamics and spectroscopy for the gas-phase complexes or clusters containing metal atoms are now undergoing in our group.

我们利用最近开发的国产质量和异构体分离检测系统，成功分离了不同异构体结构的质量选择碳簇离子。在该系统中，充满氦气的离子漂移管池位于飞行时间 (TOF) 质谱仪的无场区域内。簇源中产生的离子在静电场加速后注入电池中。然后，离子在电场的引导下穿过电池，与背景氦气相继碰撞。我们可以分离细胞中不同结构的离子，因为细胞中离子的迁移率取决于离子的几何横截面。随着该系统的发展，我们研究了具有不止一种具有可比能量的异构体结构的气相复杂系统。本项目进行了以下研究； 1) 镁单阳离子与卤代甲烷、Mg^+-XCH_3 的光解离光谱和动力学，2) 碘化钠簇离子与醇吸附物的光解离光谱，3) 包含碱金属原子的体系的簇内聚合产物的结构鉴定通过光电离质谱法和通过观察亚稳态、单分子解离反应，以及 4) 多光子激发和氮化硼簇离子 B_nN^+ 的解离反应机制及其途径。从这些研究中，我们发现了几种通过激光光谱法以及使用离子漂移管装置的直接分离方法从多个异构体系统中识别每种异构体结构的方法。我们小组目前正在对含有金属原子的气相配合物或簇的光解动力学和光谱学进行更广泛的研究。

项目成果

Photodissociation of Mg(CH_2=CHCN)_n^+ : Exited Electronic States of n=1 and 2 and Intracluster Electron Transfer for n=3 and 4

Mg(CH_2=CHCN)_n^ 的光解离：n=1 和 2 的激发电子态以及 n=3 和 4 的簇内电子转移

• 发表时间: 2003
• 期刊: The Journal of Chemical Physics 118
• 作者: Y.Inokuchi;K.Ohshimo;F.Misaizu;N.Nishi;A.Furuya et al.
• 通讯作者: A.Furuya et al.

A.Furuya, H.Tsunoyama.F.Misaizu, K.Ohno: "Photodissociation Spectroscopy of MgCH_3l^+ : Dissociation Processes via Charge Transfer and/or Chemical Bond Rupture"Chemical Physics Letters. 382. 283-290 (2003)

A.Furuya、H.Tsunoyama.F.Misaizu、K.Ohno：“MgCH_3l^ 的光解离光谱：通过电荷转移和/或化学键断裂的解离过程”化学物理快报。

Multiple Photofragmentation Pathways with Different Recoil Anisotropy from a Metal-Ion-Ligand Complex

金属-离子-配体复合物具有不同反冲各向异性的多种光裂解途径

• 发表时间: 2004
• 期刊: Physical Review Letters 93
• 作者: K.Iwata;T.Takaya;H.Hamaguchi;A.Yamakata;T.Ishibashi;O.Onishi;H.Kuroda;K.Tachibana;H.Tsuniyama et al.;香内 晃;O.David et al.;F.Misaizu et al.
• 通讯作者: F.Misaizu et al.

K.Ohshimo, F.Misaizu, K.Ohno: "Negative-Ion Photoelectron Spectroscopy of Acrylonitrile Clusters Containing A Sodium Atom"European Physical Journal D. 24. 339-342 (2003)

K.Ohshimo、F.Misaizu、K.Ohno：“含有钠原子的丙烯腈簇的负离子光电子能谱”欧洲物理杂志 D. 24. 339-342 (2003)

Intracluster Cyclization Reaction Producing a Benzene Derivative : Photoionization Mass Spectrometric Study of Alkali Metal-Methyl Propiolate Clusters

簇内环化反应产生苯衍生物：碱金属-丙炔酸甲酯簇的光电离质谱研究

• 发表时间: 2004
• 期刊: International Journal Mass Spectrometry 232
• 作者: Yokoyama;T.;M.Yamamoto;S.Fukao;R.B.Cosgrove;T.M.Kojima;H.Tsunoyama et al.
• 通讯作者: H.Tsunoyama et al.