Two-Dimensional Penning Ionization Electron Spectroscopy of 2-Aminoethanol and Related Molecules by He*(23S) Atoms: Influence of Intramolecular Hydrogen Bonding on Collisional Ionization
Two-Dimensional Penning Ionization Electron Spectroscopy of 2-Aminoethanol and Related Molecules by He*(23S) Atoms: Influence of Intramolecular Hydrogen Bonding on Collisional Ionization
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DOI：
10.1021/jp0379695
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发表时间：
2004-04
影响因子：
2.9
通讯作者：
Ryo Maruyama and;K. Ohno
中科院分区：
文献类型：
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作者：
Ryo Maruyama and;K. Ohno
用二维电子能量/碰撞能量分辨潘宁电离电子能谱(2D-PIES)研究了2-氨基乙醇(AE)、乙胺(EA)、N-甲基-2-氨基乙醇(MAE)和2-甲氧基-N-甲基乙胺(MMA)与He~*(23S)亚稳态原子碰撞时的潘宁电离。在AE和MAE中，优先形成OH····N型氢键，而在MAE中，观测数据证实了NH····O型氢键的存在。观察到与氢键相关的非键轨道电离带的氢键形成效应。随着氢键的形成，Pie中的相对能带强度显著降低，部分电离截面的碰撞能量依赖斜率变得更小的负值，峰的能量漂移也变得更小的负值。
Penning ionization of 2-aminoethanol (AE), ethylamine (EA), N-methyl-2-aminoethanol (MAE), and 2-methoxy-N-methylethylamine (MMA) upon collision with He*(23S) metastable atoms has been studied by two-dimensional electron-energy/collision-energy-resolved Penning ionization electron spectroscopy (2D-PIES) in connection with intramolecular hydrogen bonding of OH···N and NH···O types. In AE and MAE, OH···N type hydrogen bonds were found to be preferentially formed, whereas in MAE, observed data gave a confirmation of the NH···O type hydrogen bond. Effects of hydrogen bond formation were observed for ionization bands of nonbonding orbitals related to the hydrogen bond. Associated with hydrogen bond formation, the relative band intensity in PIES become considerably decreased, the slope of the collision energy dependence of partial ionization cross section become much less negative, and the peak energy shift becomes much less negative.