首页> 外文期刊>The Journal of Chemical Physics >Hydrogen bond breaking dynamics in the water pentamer: Terahertz VRT spectroscopy of a 20 mu m libration
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Hydrogen bond breaking dynamics in the water pentamer: Terahertz VRT spectroscopy of a 20 mu m libration

机译:氢键断裂动力学在水上五聚体中:Terahertz VRT光谱宽度20亩

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Hydrogen bonds in solid and liquid water are formed and broken via librational vibrations, hence characterizing the details of these motions is vital to understanding these important dynamics. Here we report the measurement and assignment of 875 transitions comprising 6 subbands originating from out-of-plane librational transitions of the water pentamer-d(10) near 512 cm(-1). The precisely measured (ca. 1 ppm) transitions reveal bifurcation splittings of similar to 1884 MHz, a similar to 4000 x enhancement over ground state splittings and 100 x greater than predicted by theory. The pentamer is thus the third water cluster to display greatly enhanced bifurcation tunneling upon single quantum excitation of librational vibrations. From the intensity pattern of the observed transitions, the mechanism of bifurcation is established by comparison with theoretical predictions. Published by AIP Publishing.
机译:通过陈词振动形成固体和液态水中的氢键,因此表征了这些动作的细节对于了解这些重要动态至关重要。 在这里,我们报告了875转换的测量和分配,其包括源自水Pentamer-D(10)接近512cm(-1)的平面外借调的6个子带。 精确测量的(约1ppm)过渡显示相似的分叉分裂与1884MHz,类似于4000 x的地面分裂,100 x大于理论预测。 因此,五聚体是第三水簇,以在单量子激发的陈词振动时显示出大大增强的分叉隧道。 从观察到的过渡的强度模式,通过与理论预测的比较建立分叉机制。 通过AIP发布发布。

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