三乙胺分子的共振增强多光子电离解离通道研究

The Resonance Enhanced Multiphoton-Ionization-Dissociation Channel Study of Triethylamine Molecule

利用TOF质谱装置对三乙胺（TEA）分子在（445．9～465．9nm）和（465．5～512.5nm）两谱区进行了共振增强多光子电离解离（REMPID）研究。质谱中除有极强的母体离子101+和母体失去一个甲基（P－CH3）的86+峰外，还检测到明显的58+，42+，30+，29+，28+，27+,26+和较弱的72+，70+，56+，44+，15+，12+等峰，并与电子轰击谱（EI）进行了对照。考虑到分子态的对称性和TEA分子吸收带S2与S1之间的内部能量转移，给出了TEA的完整MPID通道，即经3sRydberg态双光子共振的（2＋2）马电离解离通道和经3p里德堡态双光子共振的（2＋1）电离通道，且在S2和S1带重叠区存在两通道之间的竞争。

By using TOF equipment, the resonant enhanced multiphoton ionization anddissociation channel of TEA molecule has been studied in the range of (445.9～465.9 nm)and (465.5～512.5 nm), obtaining not only the strong Parent ion (101+) and daughterion (86+), but also other small ions, such as 58+, 42+, 30+, 29+, 28+, 27+, 26+, 15+.Considering the excited states, symmetry and intiamolecular electronic relaxation fromS2 to S1, we attain the complete MPID channel.