Slowing Down of Vibrational and Structural Relaxation of Water Molecules in Concentrated Aqueous NaCl Solutions

Robert Laenen; Andy Thaller

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Slowing Down of Vibrational and Structural Relaxation of Water Molecules in Concentrated Aqueous NaCl Solutions

机译：浓NaCl水溶液中水分子的振动和结构弛豫减慢

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Sub-picosecond IR-spectroscopy is applied to aqueous NaCl solutions with low concentrated HDO-molecules acting as local probes for the strength of the H-bonds. We find notable lengthening of the OH-lifetime by the presence of the dissolved ions by a factor of almost 3 up to 2.7 ps at 273 K in comparison to neat water. Simultaneously the average reorientation of the OH-dipoles slows down to 11 ps (273 K) and 4 ps (273 K) and 4 ps (343 K) while also structural relaxation is found to proceed slower as compared to the case of neat water.

机译：亚皮秒红外光谱法适用于具有低浓度HDO分子的NaCl水溶液，该分子可用作H键强度的局部探针。我们发现，与纯净水相比，在273 K下溶解离子的存在将OH寿命显着延长了近3倍，最高可达2.7 ps。同时，OH-偶极子的平均重新定向减慢到11 ps（273 K）和4 ps（273 K）和4 ps（343 K），同时与纯净水相比，结构松弛的进行也更慢。

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《Bulletin of the Chemical Society of Japan》 |2002年第5期|共6页
作者
Robert Laenen; Andy Thaller;
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正文语种 eng
中图分类化学;化学工业;
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1. Slowing Down of Vibrational and Structural Relaxation of Water Molecules in Concentrated Aqueous NaCl Solutions [J] . Robert Laenen, Andy Thaller Bulletin of the Chemical Society of Japan . 2002,第5期

机译：浓NaCl水溶液中水分子的振动和结构弛豫减慢
2. Negligible cation effect on the vibrational relaxation dynamics of water molecules in NaClO₄ and LiClO₄ aqueous electrolyte solutions [J] . Qianshun Wei, Dexia Zhou, Hongtao Bian RSC Advances . 2017,第82期

机译：阳离子对NaClO _{4 和LiClO _{4 水溶液中水分子振动弛豫动力学的影响可忽略不计}}
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5. Structural and Vibrational Properties of Liquid Water and Aqueous Solutions from First Principles Molecular Dynamics. [D] . Zhang, Cui. 2011

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Slowing Down of Vibrational and Structural Relaxation of Water Molecules in Concentrated Aqueous NaCl Solutions

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