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Glass Formation of a Coordination Polymer Crystal for Enhanced Proton Conductivity and Material Flexibility
Author(s) -
Chen Wenqian,
Horike Satoshi,
Umeyama Daiki,
Ogiwara Naoki,
Itakura Tomoya,
Tassel Cédric,
Goto Yoshihiro,
Kageyama Hiroshi,
Kitagawa Susumu
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201600123
Subject(s) - materials science , crystal (programming language) , crystal structure , dielectric , conductivity , polymer , crystallography , solid state nuclear magnetic resonance , plastic crystal , chemical physics , chemical engineering , chemistry , composite material , organic chemistry , nuclear magnetic resonance , phase (matter) , optoelectronics , engineering , computer science , programming language , physics
The glassy state of a two‐dimensional (2D) Cd 2+ 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.