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首页> 外文期刊>Physical chemistry chemical physics: PCCP >The role of charge and proton transfer in fragmentation of hydrogen-bonded nanosystems: the breakup of ammonia clusters upon single photon multi-ionization
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The role of charge and proton transfer in fragmentation of hydrogen-bonded nanosystems: the breakup of ammonia clusters upon single photon multi-ionization

机译:电荷和质子转移在氢键合纳米系统的碎片中的作用:单光子多电离时氨簇的分解

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摘要

The charge and proton dynamics in hydrogen-bonded networks are investigated using ammonia as a model system. The fragmentation dynamics of medium-sized clusters (1-2 nm) upon single photon multi-ionization is studied, by analyzing the momenta of small ionic fragments. The observed fragmentation pattern of the doubly- and triply-charged clusters reveals a spatial anisotropy of emission between fragments (back-to-back). Protonated fragments exhibit a distinct kinematic correlation, indicating a delay between ionization and fragmentation (fission). The different kinematics observed for channels containing protonated and unprotonated species provides possible insights into the prime mechanisms of charge and proton transfer, as well as proton hopping, in such a nanoscale system.
机译:使用氨作为模型系统来研究氢键网络中的电荷和质子动力学。 通过分析小离子碎片的瞬时,研究了单光子多电离后中小型簇(1-2nm)的碎片动态。 观察到的双重和三射簇的碎片模式揭示了片段之间排放的空间各向异性(背对回来)。 质子化片段表现出明显的运动相关性,表明电离和碎片(裂变)之间的延迟。 观察到含有质子化和未估值物种的通道的不同运动学提供了进入这种纳米级系统中的质子跳转机制和质子转移的主要机制的洞察力。

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