Anomalous water molecules and mechanistic effects of water nanotube clusters confined to molecular porous crystals

The Journal of Physical Chemistry. B
Makoto TadokoroKuroki Ryota

Abstract

The movement of water molecules in the limited space present within nanoscale regions, which is different from the molecular motion of bulk water, is significantly affected by strong interfacial interactions with the surrounding outer walls. Hence, most of the water molecules that are confined to nanochannel spaces having widths less than ca. 2 nm can generally be classified together as "structural water". Since the motions of such water molecules are limited by interfacial interactions with the outer wall, the nature of structural water, which is strongly influenced by the interactions, will have different characteristics from normal water. For our investigations on the characteristics of structural water, we have developed a nanoporous crystal with a diameter of ca. 1.6 nm; it was constructed from 1-D hydrophilic channels by self-organization of the designed molecules. A tubelike three-layered water cluster, called a water nanotube (WNT), is formed in each internal channel space and is regulated by H-bonds with the outer wall. The WNT undergoes a glass transition (T(g) = 107 K) and behaves as a liquid; it freezes at 234 K and changes into an icelike nanotube cluster. In this study, the structure of the WNT is investigated thr...Continue Reading

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Citations

Jul 5, 2011·The Journal of Chemical Physics·Haruka KyakunoSumio Iijima
Jul 17, 2015·The Journal of Chemical Physics·Hiroshi MatsuiKazuyuki Kuroda
Jul 20, 2012·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Makoto TadokoroTomoaki Sugaya
Sep 6, 2020·Journal of Functional Biomaterials·Hiroshi Matsui, Yasumitsu Matsuo
Jun 3, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Akira Suzuki, Hiroharu Yui

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