Cluster-Induced Desorption/Ionization of Polystyrene: Desorption Mechanism and Effect of Polymer Chain Length on Desorption Probability.
Cluster-Induced Desorption/Ionization of Polystyrene: Desorption Mechanism and Effect of Polymer Chain Length on Desorption Probability.
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聚苯乙烯簇诱导解吸/电离：解吸机制以及聚合物链长对解吸概率的影响。
DOI：
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发表时间：
2022
影响因子：
3.2
通讯作者：
M. Dürr
中科院分区：
文献类型：
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作者：
P. Schneider;F. Verloh;M. Dürr
研究了软团簇诱导聚苯乙烯低聚物的解吸/电离及其在质谱分析中的应用。在质谱中观察到完整的聚苯乙烯分子对应的清晰的峰级递进，没有检测到碎片；通过石英晶体微天平测量，推导出有效解吸。分子动力学（MD）模拟表明，即使在非极性聚苯乙烯分子的情况下，团簇诱导的脱附也是通过极性团簇中的溶解进行的。实验结果表明，对于链长较大的聚苯乙烯分子，其解吸效率明显降低。考虑到MD模拟和由长链和短链聚苯乙烯低聚物组成的混合样品的进一步实验，长链聚苯乙烯分子的脱附效率降低归因于较大的聚苯乙烯分子的更强纠缠。
Soft cluster-induced desorption/ionization of polystyrene oligomers was investigated with respect to application in mass spectrometry. Clear peak progressions corresponding to intact polystyrene molecules were observed in the mass spectra, and no fragmentation was detected; efficient desorption was deduced from quartz crystal microbalance measurements. Molecular dynamics (MD) simulations of the process revealed that even in the case of the nonpolar polystyrene molecules cluster-induced desorption proceeds via dissolvation in the polar clusters. Experimentally, a significantly lower desorption efficiency was observed for polystyrene molecules with larger chain length. Taking into account MD simulations and further experiments with mixed samples consisting of long- and short-chain polystyrene oligomers, the reduced desorption efficiency for longer chain polystyrene molecules was attributed to a stronger entanglement of the larger polystyrene molecules.
团簇成分反应性对中性 SO2 团簇引起的解吸/电离过程的影响
DOI：
10.1063/1.4979488
发表时间：
2017
期刊：
The Journal of chemical physics
影响因子：
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作者：
A. Portz;M. Baur;C. R. Gebhardt;A. J. Frank;P. Neuderth;M. Eickhoff;M. Dürr
通讯作者：
M. Dürr