Freezing and Glassy Transition of Supercooled Water Confined in Mesoporous Nanochannels

IF 1.5 4区化学 Q4 CHEMISTRY, PHYSICAL

Doklady Physical Chemistry Pub Date : 2026-04-01 DOI:10.1134/S0012501625600767

Saroja Rani Bhupatiraju, K. Tharini, Sirisha Bandi, C. R. Venkateswara Rao

引用次数: 0

Abstract

Over a broad frequency and temperature range, the dielectric characteristics of water contained in 2.5 nm mesoporous nanochannels were investigated. Two noticeable relaxation peaks, dependent on frequency and temperature, were seen in the dielectric tests. Following a thermally stimulated mechanism analogous to that of bulk ice, the glassy transitions of water inside nanochannels cause a low-temperature relaxation. Freezing of water inside the MCM-41 nanochannels is responsible for the non-Arrhenius-type behaviour seen during elevated temperature relaxation (230–280 K).

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中孔纳米通道中过冷水的冻结和玻璃化转变

在较宽的频率和温度范围内，研究了2.5 nm介孔纳米通道中水的介电特性。在介电试验中可以看到两个明显的弛豫峰，取决于频率和温度。在类似于大块冰的热刺激机制下，纳米通道内的水的玻璃化转变导致低温弛豫。MCM-41纳米通道内的水冻结是在高温弛豫（230-280 K）期间观察到的非阿伦尼乌斯型行为的原因。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Doklady Physical Chemistry 化学-物理化学

CiteScore

1.50

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Doklady Physical Chemistry is a monthly journal containing English translations of current Russian research in physical chemistry from the Physical Chemistry sections of the Doklady Akademii Nauk (Proceedings of the Russian Academy of Sciences). The journal publishes the most significant new research in physical chemistry being done in Russia, thus ensuring its scientific priority. Doklady Physical Chemistry presents short preliminary accounts of the application of the state-of-the-art physical chemistry ideas and methods to the study of organic and inorganic compounds and macromolecules; polymeric, inorganic and composite materials as well as corresponding processes. The journal is intended for scientists in all fields of chemistry and in interdisciplinary sciences.