Dissociation of neutral intermediates by using charge inversion mass spectrometry

使用电荷反转质谱法解离中性中间体

• 批准号: 13640515
• 负责人: HAYAKAWA Shigeo
• 金额: $ 2.37万
• 依托单位: Osaka Prefecture University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640515/
• 关键词: Charge Inversion; Mass spectrometry; Electron transfer collision; Dissociation of neutral species; Neutral Intermediate; Radical; Alkali metal targets; 中性種

A charge inversion mass spectrometry using alkali metal targets has been developed which produces clearer differentiation of hydrocarbon isomers than collision activated dissociation (CAD). In charge inversion MS, mass-selected positive ions are made to collide with an alkali metal target, and the resulting negative ions formed upon two-electron transfer are mass-analyzed. The internal energy deposition of the charge inversion indicates that dissociation occurs in the energy-selected neutrals formed via near-resonant neutralization. The relative peak intensity in the charge inversion spectra for some hydrocarbons depends strongly on the alkali metal target used, indicating the importance of internal energy in the dissociation of the excited neutral intermediates. These results demonstrate the utility of the charge inversion MS as a technique for the investigation of the dissociation of energy-selected neutral intermediates and for isomeric differentiation.

已经开发出一种使用碱金属靶的电荷反转质谱法，与碰撞激活解离 (CAD) 相比，它可以更清晰地区分烃异构体。在电荷反转MS中，使经过质量选择的正离子与碱金属靶碰撞，并对二电子转移时形成的负离子进行质量分析。电荷反转的内能沉积表明解离发生在通过近共振中和形成的能量选择中性粒子中。一些碳氢化合物的电荷反转光谱中的相对峰强度很大程度上取决于所使用的碱金属靶，这表明内能在激发的中性中间体解离中的重要性。这些结果证明了电荷反转 MS 作为研究能量选择的中性中间体解离和异构体分化的技术的实用性。

项目成果

S.Hayakawa, K.Tomozawa, T.Takeuchi, K.Arakawa, N.Morishita: "Evidence for a difference in the dissociation mechanism of acetylene (HCCH) and vinylidene (H_2C=C:) from charge inversion mass spectrometry."Physical Chemistry Chemical Physics.. 5. 2386-2390 (

S.Hayakawa、K.Tomozawa、T.Takeuchi、K.Arakawa、N.Morishita：“通过电荷反转质谱法证明乙炔 (HCCH) 和亚乙烯基 (H_2C=C:) 解离机制存在差异的证据。”物理

Shigeo Hayakawa: "Internal energy distribution in charge inversion mass spectrometry using alkali metal targets."International Journal of Mass Spectrometry. 212. 229-247 (2001)

Shigeo Hayakawa：“使用碱金属靶的电荷反转质谱中的内部能量分布。”国际质谱杂志。

S.Hayakawa, K.Taguchi, R.Kotani, K.Arakawa, N.Morishita: "Discrimination of isomers of dichlorobenzene using charge inversion mass spectrometry"Journal of the Mass Spectrometry Society of Japan. Vol.49. 219-223 (2001)

S.Hayakawa、K.Taguchi、R​​.Kotani、K.Arakawa、N.Morishita：“使用电荷反转质谱法辨别二氯苯的异构体”日本质谱学会杂志。

S.Hayakawa, K.Taguchi, R.Kotani, K.Arakawa, N.Morisllita: "Discrimination of isomers of dichlorobenzene using charge inversion mass spectrometry."Journal of the Mass Spectrometry Society of Japan. 49. 219-223 (2001)

S.Hayakawa、K.Taguchi、R​​.Kotani、K.Arakawa、N.Morisllita：“使用电荷反转质谱法辨别二氯苯的异构体。”日本质谱学会杂志。

S.Hayakawa, K.Taguchi, R.Kotani, K.Arakawa, N.Morishita: "Discrimination of isomers of dichlorobenzene using charge inversion mass spectrometry."Journal of the Mass Spectrometry Society of Japan. 49. 219-223 (2001)

S.Hayakawa、K.Taguchi、R​​.Kotani、K.Arakawa、N.Morishita：“使用电荷反转质谱法辨别二氯苯的异构体。”日本质谱学会杂志。