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Uniaxial Movements of a Metal–Cyanide Framework Switched by Weak Interactions through Dehydration and Rehydration
Author(s) -
Wei Bin,
Shang Ran,
Zhang Xi,
Shao XiuDan,
Yao YeFeng,
Wang ZheMing,
Xiong RenGen,
Zhang Wen
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201402892
Subject(s) - dehydration , cooperativity , molecule , hydrogen bond , crystallography , chemistry , ionic bonding , cyanide , metal , chemical physics , ion , inorganic chemistry , organic chemistry , biochemistry
A metal–cyanide framework undergoes a dehydration–rehydration triggered reversible single‐crystal‐to‐single‐crystal transformation. The resulting accordion‐like contraction–expansion corresponds to a size change along the c axis as much as 24 %. This anisotropic response arises from the cooperativity among the water molecules, K ions, and CN groups between the unique two‐dimensional bimetallic layers through weak interactions of hydrogen bonds and electrostatic (ionic) interactions. The key role of the water molecules in the dehydration–rehydration process is revealed by solid‐state 1 H NMR spectroscopy and dielectric measurements.