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Direct Observation of Ordered High‐Spin–Low‐Spin Intermediate States of an Iron(III) Three‐Step Spin‐Crossover Complex |
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| Authors: | Dr. Zhao‐Yang Li Dr. Hiroyoshi Ohtsu Dr. Tatsuhiro Kojima Dr. Jing‐Wei Dai Takefumi Yoshida Dr. Brian K. Breedlove Dr. Wei‐Xiong Zhang Dr. Hiroaki Iguchi Prof. Osamu Sato Prof. Masaki Kawano Prof. Masahiro Yamashita |
| Affiliation: | 1. Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan;2. Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), RIST Building 3-3390, Pohang, South Korea;3. Department of Chemistry, Graduate School of Science, Osaka University, Osaka, Japan;4. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, P.R. China;5. Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka, Japan |
| Abstract: | A neutral mononuclear FeIII complex [FeIII(H‐5‐Br‐thsa‐Me)(5‐Br‐thsa‐Me)]?H2O ( 1 ; H2‐5‐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. |
| Keywords: | cooperativity iron multistability spin crossover symmetry breaking |