Hydrogen bonding in protic ionic liquids: structural correlations, vibrational spectroscopy, and rotational dynamics of liquid ethylammonium nitrate
Hydrogen bonding in protic ionic liquids: structural correlations, vibrational spectroscopy, and rotational dynamics of liquid ethylammonium nitrate
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质子离子液体中的氢键:液体乙基硝酸铵的结构相关性、振动光谱和旋转动力学
DOI:
10.1088/1361-6455/aa9a9e
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
R. Ludwig
中科院分区:
文献类型:
--
作者:
T. Zentel;V. Overbeck;D. Michalik;O. Kühn;R. Ludwig
The properties of the hydrogen bonds in ethylammonium nitrate (EAN) are analyzed by using molecular dynamics simulations and infrared as well as nuclear magnetic resonance experiments. EAN features a flexible three-dimensional network of hydrogen bonds with moderate strengths, which makes it distinct from related triethylammonium-based ionic liquids. First, the network's flexibility is manifested in a not very pronounced correlation of the hydrogen bond geometries, which is caused by rapid interchanges of bonding partners. The large flexibility of the network also leads to a substantial broadening of the mid-IR absorption band, with the contributions due to N–H stretching motions ranging from 2800 to 3250 cm− 1. Finally, the different dynamics are also seen in the rotational correlation of the N–H bond vector, where a correlation time as short as 16.1 ps is observed.
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