Direct observation of low-temperature bistability in an iron(III) LIESST compound

Naoto Saigo, Yusuke Sekimoto, Manabu Nakaya, Ryo Ohtani, Msaaki Nakamura, Shinya Hayami

Research output: Contribution to journalArticlepeer-review


Iron(III) Schiff base compound [Fe(pap)2]ClO4·H2O (1, and Hpap = (2-(2-pyridylmethyleneamino)phenol)) shows abrupt spin crossover (SCO) with a hysteresis (T1/2↓ = 165 K, T1/2↑ = 180 K) and anomalous light induced excited spin state trapping. In the complex 1, the existence of the interaction between molecules by π electrons is suggested from single crystal structure. An anomalous LS → HS conversion, aberrant increase of HS molar fraction, was observed at low-temperature (50 K) in 1 after rapid cooling, and interpreted in terms of bistability resulted from strong cooperative interactions.

Original languageEnglish
Pages (from-to)225-228
Number of pages4
JournalJournal of Inclusion Phenomena and Macrocyclic Chemistry
Issue number1-2
Publication statusPublished - Jun 1 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Food Science
  • Chemistry(all)
  • Condensed Matter Physics


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