Direct Observation of Ordered High-Spin-Low-Spin Intermediate States of an Iron(III) Three-Step Spin-Crossover Complex

Zhao Yang Li, Hiroyoshi Ohtsu, Tatsuhiro Kojima, Jing Wei Dai, Takefumi Yoshida, Brian K. Breedlove, Wei Xiong Zhang, Hiroaki Iguchi, Osamu Sato, Masaki Kawano, Masahiro Yamashita

Research output: Contribution to journalArticle

30 Citations (Scopus)

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. In quite a state: A neutral mononuclear FeIII complex [FeIII(H-5-Br-thsa-Me)(5-Br-thsa-Me)] H2O (thsa=5-bromosalicylaldehyde methylthiosemicarbazone) exhibited a three-step spin crossover with symmetry breaking and a 14 K hysteresis loop owing to strong cooperativity (see picture). The intermediate spin states showed remarkable long-range 4 HS-2 LS and 2 HS-4 LS spin-state ordering (HS=high-spin, red; LS=low-spin, green).

Original languageEnglish
Pages (from-to)5184-5189
Number of pages6
JournalAngewandte Chemie - International Edition
Volume55
Issue number17
DOIs
Publication statusPublished - Apr 18 2016

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Hysteresis loops
Iron
Phase transitions
5-bromosalicylaldehyde

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

Direct Observation of Ordered High-Spin-Low-Spin Intermediate States of an Iron(III) Three-Step Spin-Crossover Complex. / Li, Zhao Yang; Ohtsu, Hiroyoshi; Kojima, Tatsuhiro; Dai, Jing Wei; Yoshida, Takefumi; Breedlove, Brian K.; Zhang, Wei Xiong; Iguchi, Hiroaki; Sato, Osamu; Kawano, Masaki; Yamashita, Masahiro.

In: Angewandte Chemie - International Edition, Vol. 55, No. 17, 18.04.2016, p. 5184-5189.

Research output: Contribution to journalArticle

Li, ZY, Ohtsu, H, Kojima, T, Dai, JW, Yoshida, T, Breedlove, BK, Zhang, WX, Iguchi, H, Sato, O, Kawano, M & Yamashita, M 2016, 'Direct Observation of Ordered High-Spin-Low-Spin Intermediate States of an Iron(III) Three-Step Spin-Crossover Complex', Angewandte Chemie - International Edition, vol. 55, no. 17, pp. 5184-5189. https://doi.org/10.1002/anie.201511281
Li, Zhao Yang ; Ohtsu, Hiroyoshi ; Kojima, Tatsuhiro ; Dai, Jing Wei ; Yoshida, Takefumi ; Breedlove, Brian K. ; Zhang, Wei Xiong ; Iguchi, Hiroaki ; Sato, Osamu ; Kawano, Masaki ; Yamashita, Masahiro. / Direct Observation of Ordered High-Spin-Low-Spin Intermediate States of an Iron(III) Three-Step Spin-Crossover Complex. In: Angewandte Chemie - International Edition. 2016 ; Vol. 55, No. 17. pp. 5184-5189.
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