Glass transition of aqueous solutions involving annealing-induced ice recrystallization resolves liquid-liquid transition puzzle of water.
Glass transition of aqueous solutions involving annealing-induced ice recrystallization resolves liquid-liquid transition puzzle of water.
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DOI：
10.1038/srep15714
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发表时间：
2015-10-27
影响因子：
4.6
通讯作者：
Wang Q
中科院分区：
文献类型：
--
作者：
Zhao LS;Cao ZX;Wang Q
水的液-液相变是凝聚态物理中的一个重要概念。最近，它被声称已被证实在水溶液中的基础上退火诱导的玻璃-液体转变温度的上移。在这里，我们报告了一个普遍的水含量，依赖于水溶液。在恒定温度下玻璃化/失透的溶液，指的是冷冻浓缩相，留下冰结晶。在常规的冷却/加热过程中，样品在一定温度下退火， 为了有效地引起冰的再结晶，稳定在。重复了文献中对甘油和1，2，4-丁三醇水溶液的实验，并对相同样品进行了其他退火处理，同样重现了结果。通过退火的上移归因于溶液的冷冻浓缩相而不是“水的液体II相”。我们的工作也提供了一个可靠的方法来确定水化公式和审查溶质-溶剂在溶液中的相互作用。
Liquid-liquid transition of water is an important concept in condensed-matter physics. Recently, it was claimed to have been confirmed in aqueous solutions based on annealing-induced upshift of glass-liquid transition temperature, . Here we report a universal water-content, , dependence of for aqueous solutions. Solutions with vitrify/devitrify at a constant temperature, , referring to freeze-concentrated phase with left behind ice crystallization. Those solutions with totally vitrify at under conventional cooling/heating process though, of the samples annealed at temperatures to effectively evoke ice recrystallization is stabilized at . Experiments on aqueous glycerol and 1,2,4-butanetriol solutions in literature were repeated, and the same samples subject to other annealing treatments equally reproduce the result. The upshift of by annealing is attributable to freeze-concentrated phase of solutions instead of ‘liquid II phase of water’. Our work also provides a reliable method to determine hydration formula and to scrutinize solute-solvent interaction in solution.