Giant Single-Crystal Shape Transformation with Wide Thermal Hysteresis Actuated by Synergistic Motions of Molecular Cations and Anions

Xiao Lei Wang, Jin Peng Xue, Xiao Peng Sun, Yan Xin Zhao, Shu Qi Wu, Zi Shuo Yao, Jun Tao

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

Manipulating the collective molecular movements to implement macroscopic mechanical response of bulk material is attractive and challenging. Here, an organic-inorganic hybrid single crystal is synthesized, which exhibits a giant macroscopic shape transformation with a remarkable thermal hysteretic feature. The colossal anisotropic shape change, which manifests as an abrupt elongation of ca. 9 % along the crystallographic c-axis and a concomitant contraction of ca. 9 % in a perpendicular direction, is induced by a significant reorientation of imidazolium, accompanied with a substantial configurational variation in CuBr4 2− complex anions. The synergistic motions of both the molecular cations and anions engender a remarkable large thermal hysteresis (>30 K) in the shape transformation of the single crystal, implying that this material may play a role in alternating memory media. Furthermore, due to the stable crystal lattice, a single crystal that demonstrates naked-eye detectable large shape transformation was used as a thermal actuator to spontaneously control an electric circuit by temperature variation.

本文言語英語
ページ(範囲)6778-6783
ページ数6
ジャーナルChemistry - A European Journal
26
30
DOI
出版ステータス出版済み - 5 26 2020

All Science Journal Classification (ASJC) codes

  • 触媒
  • 有機化学

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