Journal article
Ken‐ichi Otake, K. Otsubo, T. Komatsu, Shun Dekura, Jared M. Taylor, R. Ikeda, K. Sugimoto, A. Fujiwara, Chien‐Pin Chou, A. W. Sakti, Y. Nishimura, H. Nakai, H. Kitagawa
Nature Communications, 2020
Nature Communications, 2020
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APA
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Otake, K., Otsubo, K., Komatsu, T., Dekura, S., Taylor, J. M., Ikeda, R., … Kitagawa, H. (2020). Confined water-mediated high proton conduction in hydrophobic channel of a synthetic nanotube. Nature Communications.
Chicago/Turabian
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Otake, Ken‐ichi, K. Otsubo, T. Komatsu, Shun Dekura, Jared M. Taylor, R. Ikeda, K. Sugimoto, et al. “Confined Water-Mediated High Proton Conduction in Hydrophobic Channel of a Synthetic Nanotube.” Nature Communications (2020).
MLA
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Otake, Ken‐ichi, et al. “Confined Water-Mediated High Proton Conduction in Hydrophobic Channel of a Synthetic Nanotube.” Nature Communications, 2020.
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@article{ken2020a,
title = {Confined water-mediated high proton conduction in hydrophobic channel of a synthetic nanotube},
year = {2020},
journal = {Nature Communications},
author = {Otake, Ken‐ichi and Otsubo, K. and Komatsu, T. and Dekura, Shun and Taylor, Jared M. and Ikeda, R. and Sugimoto, K. and Fujiwara, A. and Chou, Chien‐Pin and Sakti, A. W. and Nishimura, Y. and Nakai, H. and Kitagawa, H.}
}
Abstract
Water confined within one-dimensional (1D) hydrophobic nanochannels has attracted significant interest due to its unusual structure and dynamic properties. As a representative system, water-filled carbon nanotubes (CNTs) are generally studied, but direct observation of the crystal structure and proton transport is difficult for CNTs due to their poor crystallinity and high electron conduction. Here, we report the direct observation of a unique water-cluster structure and high proton conduction realized in a metal-organic nanotube, [Pt(dach)(bpy)Br] 4 (SO 4 ) 4 ·32H 2 O (dach: (1R, 2R)-(–)-1,2-diaminocyclohexane; bpy: 4,4’-bipyridine). In the crystalline state, a hydrogen-bonded ice nanotube composed of water tetramers and octamers is found within the hydrophobic nanochannel. Single-crystal impedance measurements along the channel direction reveal a high proton conduction of 10 −2 Scm −1 . Moreover, fast proton diffusion and continuous liquid-to-solid transition are confirmed using solid-state 1 H-NMR measurements. Our study provides valuable insight into the structural and dynamical properties of confined water within 1D hydrophobic nanochannels. Water confined in natural or synthetic hydrophobic nano-spaces behaves differently than in the bulk. Here the authors investigate water in hydrophobic synthetic 1D nanochannels revealing water clustering in tetramers and octamers and high proton conductivity, along with a continuous liquid to solid transition.
