量子质子离域对电子通过氢键转移的影响
Unravelling the influence of quantum proton delocalization on electronic charge transfer through the hydrogen bond
摘要：
在形成氢键后，电子电荷密度在供体和受体之间转移，影响从水合到光谱的过程。在这里，我们使用从头算路径积分模拟，以阐明核量子效应在确定的范围内的氢键物种在气相和液相中的电荷转移的作用。我们表明，原子核的量子化会引起电荷转移幅度及其温度依赖性的巨大变化。然后，我们解释了如何一个单一的几何参数确定通过氢键的电荷转移。因此，这些结果表明，核量子效应是至关重要的电荷转移的准确描述，并提供了一个物理透明的方式来理解氢键如何引起它。
英文摘要：
Upon hydrogen bond formation, electronic charge density is transferred between the donor and acceptor, impacting processes ranging from hydration to spectroscopy. Here we use ab initio path integral simulations to elucidate the role of nuclear quantum effects in determining the charge transfer in a range of hydrogen bonded species in the gas and liquid phase. We show that the quantization of the nuclei gives rise to large changes in the magnitude of the charge transfer as well as its temperature dependence. We then explain how a single geometric parameter determines the charge transfer through the hydrogen bond. These results thus demonstrate that nuclear quantum effects are vital for the accurate description of charge transfer and offer a physically transparent way to understand how hydrogen bonding gives rise to it.
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