Experimental observation of guanine tautomers with VUV photoionization.
Experimental observation of guanine tautomers with VUV photoionization.
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VUV 光电离实验观察鸟嘌呤互变异构体。
DOI：
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发表时间：
2009
影响因子：
2.9
通讯作者：
Musahid Ahmed
中科院分区：
文献类型：
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作者：
Jia Zhou;O. Kostko;C. Nicolas;Xiaonan Tang;Leonid Belau;M. de Vries;Musahid Ahmed
研究了两种气相制备鸟嘌呤的方法：热蒸发法和激光解吸法。每种方法产生的鸟嘌呤夹带在分子束中，用可调谐真空紫外同步辐射单光子电离，并使用反射质谱分析。记录的光电离效率（PIE）曲线显示了显着的差异，通过热蒸发相比，激光解吸进行的实验。计算的垂直和绝热电离能的八个最低的躺在鸟嘌呤的互变异构体表明，实验观察产生不同的互变异构体被填充在两种不同的实验方法。
Two methods of preparing guanine in the gas phase, thermal vaporization and laser desorption, have been investigated. The guanine generated by each method is entrained in a molecular beam, single-photon ionized with tunable VUV synchrotron radiation, and analyzed using reflectron mass spectrometry. The recorded photoionization efficiency (PIE) curves show a dramatic difference for experiments performed via thermal vaporization compared to that with laser desorption. The calculated vertical and adiabatic ionization energies for the eight lowest-lying tautomers of guanine suggest that the experimental observations arise from different tautomers being populated in the two different experimental methods.