Rapid Water Transportation through Narrow One-Dimensional Channels by Restricted Hydrogen Bonds

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• 作者：Tomonori Ohba ; Katsumi Kaneko ; Morinobu Endo ; Kenji Hata ; Hirofumi Kanoh
• 刊名：Langmuir
• 出版年：2013
• 出版时间：January 29, 2013
• 年：2013
• 卷：29
• 期：4
• 页码：1077-1082
• 全文大小：290K
• 年卷期：v.29,no.4(January 29, 2013)
• ISSN：1520-5827

文摘

Water plays an important role in controlling chemical reactions and bioactivities. For example, water transportation through water channels in a biomembrane is a key factor in bioactivities. However, molecular-level mechanisms of water transportation are as yet unknown. Here, we investigate water transportation through narrow and wide one-dimensional (1D) channels on the basis of water-vapor adsorption rates and those determined by molecular dynamics simulations. We observed that water in narrow 1D channels was transported 3鈥? times faster than that in wide 1D channels, although the narrow 1D channels provide fewer free nanospaces for water transportation. This rapid transportation is attributed to the formation of fewer hydrogen bonds between water molecules adsorbed in narrow 1D channels. The water-transportation mechanism provides the possibility of rapid communication through 1D channels and will be useful in controlling reactions and activities in water systems.