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

Wenqian Chen, Satoshi Horike, Daiki Umeyama, Naoki Ogiwara, Tomoya Itakura, Cédric Tassel, Yoshihiro Goto, Hiroshi Kageyama, Susumu Kitagawa

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

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. 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).

Original languageEnglish
Pages (from-to)5195-5200
Number of pages6
JournalAngewandte Chemie - International Edition
Volume55
Issue number17
DOIs
Publication statusPublished - 2016 Apr 18

Keywords

  • coordination polymers
  • glasses
  • mechanical properties
  • mechanochemistry
  • proton conductivity

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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