甜菜碱
两性离子
离子
化学
脱质子化
偶极子
电子
光电发射光谱学
原子物理学
X射线光电子能谱
物理
分子
核磁共振
生物化学
量子力学
有机化学
作者
Wei‐Jun Zheng,Shou‐Jun Xu,D. Radisic,Sarah T. Stokes,Xiang Li,Kit H. Bowen
摘要
Betaine is a permanent zwitterion. The molecular betaine anion has been generated in a hybrid, infrared desorption-electron photoemission source and its photoelectron spectrum recorded. The photoelectron spectrum of the betaine anion is characteristic of a dipole bound anion, and its vertical detachment energy was measured to be 0.29±0.03eV. Calculations by Rak, Skurski, and Gutowski [J. Chem. Phys. 114, 10673 (2001)] had found the betaine anion to be a dipole bound anion with a vertical detachment energy of 0.28 eV. We also measured the vertical detachment energy of deprotonated betaine to be ∼1.9eV.
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