Stabilization of long-lived metastable state in long alkylated spin-crossover cobalt(II) compound

Shinya Hayami; Daisuke Urakami; Yoshihiro Kojima; Hokuto Yoshizaki; Yuuki Yamamoto; Kazuya Kato; Akira Fuyuhiro; Satoshi Kawata; Katsuya Inoue

doi:10.1021/ic9015417

Stabilization of long-lived metastable state in long alkylated spin-crossover cobalt(II) compound

Inorg Chem. 2010 Feb 15;49(4):1428-32. doi: 10.1021/ic9015417.

Authors

Shinya Hayami¹, Daisuke Urakami, Yoshihiro Kojima, Hokuto Yoshizaki, Yuuki Yamamoto, Kazuya Kato, Akira Fuyuhiro, Satoshi Kawata, Katsuya Inoue

Affiliation

¹ Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto, 860-8555 Japan. hayami@sci.kumamoto-u.ac.jp

PMID: 20067247
DOI: 10.1021/ic9015417

Abstract

The A mixed crystal compound [Co(0.8)Fe(0.2)(C16-terpy)(2)](BF(4))(2) (2) (C16-terpy is 4'-hexadecyloxy-2,2':6',2''-terpyridine) with long alkyl chains was prepared by mixing [Co(C16-terpy)(2)](BF(4))(2) (1), which exhibits unique magnetic behavior, and the diamagnetic iron(II) compound [Fe(C16-terpy)(2)](BF(4))(2) (3). The long-lived metastable state in the frozen-in effect was observed for the first time in the spin-crossover cobalt(II) compound 2. Furthermore, relaxation from metastable to stable states was very slow because of a large structural transition resulting from the long alkyl chains.