Liu Xun, Liu Shiyu, Chen Enyi, Peng Liang, Yu Yao
School of Materials Science and Engineering and State Key Lab for Materials Processing and Die and Mold Technology , Huazhong University of Science and Technology , Wuhan 430074 , People's Republic of China.
Wuhan National High Magnetic Field Center , Huazhong University of Science and Technology , Wuhan 430074 , People's Republic of China.
J Phys Chem Lett. 2019 Aug 1;10(15):4285-4290. doi: 10.1021/acs.jpclett.9b01101. Epub 2019 Jul 18.
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.
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