A neutral Fe(III) compound exhibiting a two-step spin transition and dielectric anomalies

Zhao-Yang Li; Jing-Wei Dai; Kevin J. Gagnon; Hong-Ling Cai; Takashi Yamamoto; Yasuaki Einaga; Han-Hua Zhao; Shinji Kanegawa; Osamu Sato; Kim R. Dunbar; Ren-Gen Xiong

doi:10.1039/C3DT51554K

A neutral Fe(iii) compound exhibiting a two-step spin transition and dielectric anomalies†

Zhao-Yang Li,^ab Jing-Wei Dai,^a Kevin J. Gagnon,^b Hong-Ling Cai,^c Takashi Yamamoto,^d Yasuaki Einaga,^d Han-Hua Zhao,^b Shinji Kanegawa,^a Osamu Sato,*^a Kim R. Dunbar*^b and Ren-Gen Xiong^c

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* Corresponding authors

^a Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka, Japan
E-mail: sato@cm.kyushu-u.ac.jp
Fax: +81 92 5837787
Tel: +81 92 5837787

^b Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, TX 77842-3012, USA
E-mail: dunbar@mail.chem.tamu.edu
Fax: +1 979 8457177
Tel: +1 979 8455235

^c Ordered Matter Science Research Centre, Southeast University, Nanjing 211189, China

^d Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama, Kanagawa 223-8522, Japan

Abstract

The mononuclear ferric compound Fe(H-5-Cl-thsa-Me)(5-Cl-thsa-Me)·H₂O (1) was synthesized and characterized using powder/single-crystal X-ray diffraction, Mössbauer spectroscopy, differential scanning calorimetry (DSC), and magnetic susceptibility measurements. This photo-responsive compound shows reversible, two-step spin-crossover behaviour. Moreover, dielectric anomalies were observed during the spin transitions, demonstrating the multifunctional properties of compound 1.

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A neutral Fe(iii) compound exhibiting a two-step spin transition and dielectric anomalies†

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A neutral Fe(III) compound exhibiting a two-step spin transition and dielectric anomalies

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