Variable-Temperature Rate Coefficients for the Electron Transfer Reaction N2+ + H2O Measured with a Coaxial Molecular Beam Radio Frequency Ring Electrode Ion Trap

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• 作者：Bing Yuan ; Zachary Scott ; George Tikhonov ; Dieter Gerlich ; Mark A. Smith
• 刊名：Journal of Physical Chemistry A
• 出版年：2011
• 出版时间：January 13, 2011
• 年：2011
• 卷：115
• 期：1
• 页码：25-29
• 全文大小：187K
• 年卷期：v.115,no.1(January 13, 2011)
• ISSN：1520-5215

文摘

The neutral molecule temperature dependence of the rate coefficient for the electron transfer reaction from H₂O to N₂p>+p> is determined using a coaxial molecular beam radio frequency ring electrode ion trap (CoMB-RET) method. The temperature of the N₂p>+p> ions was maintained at 100 K, while the effusive water beam temperature was varied from 300 to 450 K. The result demonstrates the neutral molecule rotational/translational energy dependence on the rate coefficient of an ion鈭抎ipolar molecule reaction. It is found that the rate coefficient in the above temperature range follows the prediction of the simplest ion鈭抎ipole capture model. Use of different buffer gas collisional cooling in both the ion source and the RET reveals the effects of both translational and vibrational energy of the N₂p>+p> ions.