Iron(III) spin transition compound with a large thermal hysteresis

S. Hayami, T. Kawahara, G. Juhász, K. Kawamura, K. Uehashi, O. Sato, Y. Maeda

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


The magnetic properties of the spin-crossover compound, [Fe(qsal) 2 ]NCSe·2DMSO (N-(8-quinolyl)-salicyladimine) (1), have been measured. We have discovered that the compound 1 exhibits a wide "thermal hysteresis loop" of 115 K (T 1/2 ↑ = 324 K and T 1/2 ↓ = 209 K) in the first cycle. Thermogravimetric analysis shows that solvent molecules of the compound 1 are removed at around 324 K. This means that the hysteresis loop observed for the first cycle is only an apparent one. Following the first loop, the compound 1 shows a spin-crossover in warming mode. The spin transition occurs at T 1/2 ↑ = 285 K and T 1/2 ↓ = 209 K and the hysteresis width can be estimated to be 76 K, which is one of the largest values reported so far for spin-crossover compounds. It is thought that the cooperativity produced in the compound mainly arises from the intermolecular π interactions between the quinoline and the phenyl rings.

Original languageEnglish
Pages (from-to)443-447
Number of pages5
JournalJournal of Radioanalytical and Nuclear Chemistry
Issue number3
Publication statusPublished - Mar 1 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis


Dive into the research topics of 'Iron(III) spin transition compound with a large thermal hysteresis'. Together they form a unique fingerprint.

Cite this