Two States of Water Converge to One State below 215 K
Two States of Water Converge to One State below 215 K
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低于 215 K 时两种水态会聚合为一种水态
DOI：
10.1021/acs.jpclett.1c01132
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Nishide Hiroyuki
中科院分区：
文献类型：
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作者：
Oka Kouki;Shibue Toshimichi;Sugimura Natsuhiko;Watabe Yuki;Tanaka Midori;Winther-Jensen Bjorn;Nishide Hiroyuki
水的反常现象可用二态水模型来解释。在该模型中，水在过冷时变成一种状态。然而，水在235 K以下完全结晶（“无人区”）。水异常的构造成因隐藏在“无人区”中。为了了解水的性质，在“诺曼地”进行光谱实验是不可避免的。因此，我们提出了一种新的标准核磁共振谱的软约束方法来探索“无人区”。我们发现在环境压力下的奇异温度（215 K）。水在215 K以下以一种状态存在。在215 K以上，水的两种状态是液-液临界点的超临界状态。本研究为确定高压条件下水的液-液临界点提供了一种新的思路。
Anomalies of water have been explained by the two-state water model. In the model, water becomes one state upon supercooling. However, water crystallizes completely below 235 K (“no man’s land”). The structural origin of the anomalous of the water is hidden in the “no man’s land”. To understand the properties of water, the spectroscopic experiment in “Norman’s land” is inevitable. Hence, we proposed a new soft-confinement method for standard nuclear magnetic resonance spectroscopy to explore the “no man’s land”. We found the singularity temperature (215 K) at ambient pressure. Water exists in one state below 215 K. Above 215 K, the two states of water are supercritical states of the liquid–liquid critical point. The current study provides a perspective to determine the liquid–liquid critical point of water existing in a high-pressure condition.