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Reversible Structural Phase Transition and Dielectric Switches Induced by Disordering‐Ordering Motion of Tetrachloroferrate (III) Anions
Author(s) -
Tang YunZhi,
Wang ChangFeng,
Chen ShaoPeng,
Tan YuHui,
Yang ChangShan,
Wen HeRui
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201701468
Subject(s) - dielectric , phase transition , chemistry , crystallography , phase (matter) , transition metal , condensed matter physics , chemical physics , materials science , physics , optoelectronics , organic chemistry , catalysis
Reversible phase transitions triggered by guest AX 4 type metal structural anions such as AuCl 4 − , FeCl 4 − etc are sparely documented before. Here we reported a host–guest clathrate, 18‐crown‐6 potassium tetrachloroferrate, [K 2 (C 12 H 24 O 6 )] 2+ ⋅[FeCl 4 ] 2 2– ( 1 ) which exhibits reversible phase transition around 135 K. This special phase transition behaviours were further confirmed by the heat and dielectric anomalies in the vicinity of 135 K. The structural transition mechanism can be attributed to the ordering‐disordering motion of the tetrachloroferrate anions. Its switchable dielectric behaviours around the phase transition point suggest it maybe a potential material for dielectric switches.