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First-Order Liquid-Liquid Transition Without Density Discontinuity in Molten Sodium Acetate Trihydrate and Its Influence on Crystallization

First-Order Liquid-Liquid Transition Without Density Discontinuity in Molten Sodium Acetate Trihydrate and Its Influence on Crystallization

Xun Liu, Shiyu Liu, Enyi Chen, Liang Peng, Yao Yu

J Phys Chem Lett. 2019 Aug 1;10(15):4285-4290.

PMID: 31318570

Abstract:

Liquid-liquid transition (LLT) refers to the phase transition among thermodynamically distinct liquid states with identical composition in analogy to the polymorphic transition in solid. The growing awareness of its significance to understanding the nature of liquid also provokes curiosity about its potential impact on crystallization. Here, we report a first-order liquid-liquid transition above liquidus temperature in the melt of sodium acetate trihydrate using nuclear magnetic resonance, differential scanning calorimetry, and high-precision density measurements, which show negligible change in density associated with the observed LLT. Further, the kinetics and products of crystallization are significantly influenced by LLT, providing a new way for the controlling crystallization pathway and realizing crystal polymorph selection.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP6131904	Sodium acetate trihydrate		6131-90-4	Price

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