The Fluorite/Water Interfaces: Structure and Spectroscopy from First Principles Simulations

The Fluorite/Water Interfaces: Structure and Spectroscopy from First Principles Simulations
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萤石/水界面:第一原理模拟的结构和光谱

DOI:
10.1007/978-3-319-10810-0_13
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
M Sulpizi
M Sulpizi
中科院分区:
--
文献类型:
--
作者:
R Khatib;M Sulpizi

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相似文献

尽管其相关的工业,环境和医疗应用,萤石/水界面仍然缺乏微观/原子表征。在这方面的贡献,我们提供了第一个原子描述这样的接口使用第一性原理分子动力学模拟。我们的模型,探索了广泛的pH值,能够提供一个合理的最近的振动光谱实验。特别是,我们发现,在中性pH值的界面处的水是无序的,与实验数据一致,并解释为什么没有振动和频产生(VSFG)信号被记录。在高pH值下,OH基团定位在界面处负责在振动光谱实验中记录的“自由OH信号”。最后,我们提出了一个可能的模型,在低pH值条件下,F-空位诱导界面水的强烈分层。
Despite its relevance to industrial, environmental and medical application, the fluorite/water interface still lacks a microscopic/atomistic characterization. In this contribution we provide the first atomistic description of such interface usingfirst principlesmolecular dynamics simulations. Our models, which explore a wide range of pH, are able to provide a rational of the recent vibrational spectroscopy experiments. In particular we find that at neutral pH the water at the interface is disordered, in agreement with the experimental data, and explaining why no Vibrational Sum Frequency Generation (VSFG) signal is recorded. At high pH, OH groups which localize at the interface are responsible for the “free OH signal” recorded in the vibrational spectroscopy experiments. Finally we propose one possible model for the low pH condition where the F−vacancies induce a strong layering of the interfacial water.
使用从头计算和离子淌度质谱法分析糖肽离子的分子结构
DOI: --
发表时间: 2019
期刊:
影响因子: --
作者:
中村賀美;竹内孝江
通讯作者: 竹内孝江
晶体稀有气体混合物的振动态密度和红外吸收的分子动力学计算。
DOI: --
发表时间: 1992
期刊: Physical Review B (Condensed Matter)
影响因子: --
作者:
Gonçalves;Bonadeo
通讯作者: Bonadeo
DOI: 10.1021/jp711545s
发表时间: 2008-07-10
影响因子: 2.9
作者:
Frigato, Tomaso;VandeVondele, Joost;Jungwirth, Pavel
通讯作者: Jungwirth, Pavel