Signature of the hydrogen-bonded environment of liquid water in X-ray emission spectra from first-principles calculations
Huaze Shen , Mohan Chen , Zhaoru Sun , Limei Xu , Enge Wang , Xifan Wu
Front. Phys. ›› 2018, Vol. 13 ›› Issue (1) : 138204
Signature of the hydrogen-bonded environment of liquid water in X-ray emission spectra from first-principles calculations
Based on ab initio molecular dynamics simulations and density functional theory, we performed a systematic theoretical study to elucidate the correlation between the H-bonded environment and Xray emission spectra of liquid water. The spectra generated from excited water molecules embedded in an intact H-bonded environment yield broader spectral peaks and a larger spectral range than the spectra generated from water molecules in a broken H-bonded environment. Such differences are caused by the local electronic structures on the excited water molecules within the core-hole lifetime that evolve differently through the rearrangement of neighboring water molecules in different H-bonded environments.
water / density functional theory / ab initio molecular dynamics / X-ray emission spectra / hydrogen bond / core hole
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Higher Education Press and Springer-Verlag GmbH Germany
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