Volume 55, Issue 17 pp. 5195-5200
Communication

Glass Formation of a Coordination Polymer Crystal for Enhanced Proton Conductivity and Material Flexibility

Dr. Wenqian Chen

Dr. Wenqian Chen

Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615–8510 Japan

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Dr. Satoshi Horike

Corresponding Author

Dr. Satoshi Horike

Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615–8510 Japan

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Dr. Daiki Umeyama

Dr. Daiki Umeyama

Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615–8510 Japan

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Naoki Ogiwara

Naoki Ogiwara

Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615–8510 Japan

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Tomoya Itakura

Tomoya Itakura

DENSO CORPORATION, 1-1 Showa-cho, Kariya, Aichi, 448–8661 Japan

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Dr. Cédric Tassel

Dr. Cédric Tassel

Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615–8510 Japan

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Yoshihiro Goto

Yoshihiro Goto

Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615–8510 Japan

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Prof. Hiroshi Kageyama

Prof. Hiroshi Kageyama

Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615–8510 Japan

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Prof. Susumu Kitagawa

Corresponding Author

Prof. Susumu Kitagawa

Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615–8510 Japan

Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606–8501 Japan

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First published: 16 March 2016
Citations: 132

Graphical Abstract

Phase transitions: The glassy state of a two-dimensional (2D) Cd2+ coordination polymer crystal was prepared by a solvent-free mechanical milling process. The coordination polymer shows an increased proton conductivity and an increased dielectric constant in the glassy state (see picture).

Abstract

The glassy state of a two-dimensional (2D) Cd2+ coordination polymer crystal was prepared by a solvent-free mechanical milling process. The glassy state retains the 2D structure of the crystalline material, albeit with significant distortion, as characterized by synchrotron X-ray analyses and solid-state multinuclear NMR spectroscopy. It transforms to its original crystal structure upon heating. Thus, reversible crystal-to-glass transformation is possible using our new processes. The glass state displays superior properties compared to the crystalline state; specifically, it shows anhydrous proton conductivity and a dielectric constant two orders of magnitude greater than the crystalline material. It also shows material flexibility and transparency.

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