Glass Formation of a Coordination Polymer Crystal for Enhanced Proton Conductivity and Material Flexibility |
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| Authors: | Dr. Wenqian Chen Dr. Satoshi Horike Dr. Daiki Umeyama Naoki Ogiwara Tomoya Itakura Dr. Cédric Tassel Yoshihiro Goto Prof. Hiroshi Kageyama Prof. Susumu Kitagawa |
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| Affiliation: | 1. Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan;2. DENSO CORPORATION, Aichi, Japan;3. Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, Japan;4. Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto, Japan |
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| 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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| Keywords: | coordination polymers glasses mechanical properties mechanochemistry proton conductivity |
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