Authors:
S. HayamiKyushu University Department of Chemistry, Faculty of Science 6-10-1 Hakozaki Higashi-ku, Fukuoka 812-8581 Japan

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T. KawaharaKyushu University Department of Chemistry, Faculty of Science 6-10-1 Hakozaki Higashi-ku, Fukuoka 812-8581 Japan

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G. JuhászKyushu University Budapest Department of Chemistry, Faculty of Science 6-10-1 Hakozaki Higashi-ku, Fukuoka 812-8581 Japan

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K. KawamuraKyushu University Department of Chemistry, Faculty of Science 6-10-1 Hakozaki Higashi-ku, Fukuoka 812-8581 Japan

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K. UehashiKyushu University Department of Chemistry, Faculty of Science 6-10-1 Hakozaki Higashi-ku, Fukuoka 812-8581 Japan

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O. SatoKanagawa Academy of Science and Technology Special Research Laboratory for Optical Science East 412, 3-2-1 Sakado Takatsu-ku, Kawasaki-shi, Kanagawa 213-0012 Japan

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Y. MaedaKyushu University Graduate School of Sciences Department of Chemistry, Faculty of Science Hakozaki, Higashi-ku, Fukuoka 812-8581 Japan

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Abstract  

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 (T1/2 = 324 K and T1/2 = 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 T1/2= 285 K and T1/2 = 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 interactions between the quinoline and the phenyl rings.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)