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Direct Observation of Ordered High‐Spin–Low‐Spin Intermediate States of an Iron(III) Three‐Step Spin‐Crossover Complex
Author(s) -
Li ZhaoYang,
Ohtsu Hiroyoshi,
Kojima Tatsuhiro,
Dai JingWei,
Yoshida Takefumi,
Breedlove Brian K.,
Zhang WeiXiong,
Iguchi Hiroaki,
Sato Osamu,
Kawano Masaki,
Yamashita Masahiro
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201511281
Subject(s) - spin crossover , multistability , chemistry , spin transition , cooperativity , spin (aerodynamics) , crystallography , hysteresis , spin states , condensed matter physics , phase (matter) , physics , inorganic chemistry , thermodynamics , biochemistry , organic chemistry , quantum mechanics , nonlinear system
A neutral mononuclear Fe III complex [Fe III (H‐5‐Br‐thsa‐Me)(5‐Br‐thsa‐Me)]⋅H 2 O ( 1 ; H 2 ‐5‐Br‐thsa‐Me=5‐bromosalicylaldehyde methylthiosemicarbazone) was prepared that exhibited a three‐step spin‐crossover (SCO) with symmetry breaking and a 14 K hysteresis loop owing to strong cooperativity. Two ordered intermediate states of 1 were observed, 4HS–2LS and 2HS–4LS, which exhibited reentrant phase‐transition behavior. This study provides a new platform for examining multistability in SCO complexes.