4.7 Article

Stabilization of Long-Lived Metastable State in Long Alkylated Spin-Crossover Cobalt(II) Compound

Journal

INORGANIC CHEMISTRY
Volume 49, Issue 4, Pages 1428-1432

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ic9015417

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Funding

  1. New Energy and Industrial Technology Development Organization (NEDO) of Japan
  2. Ministry of Education, Culture, Sports, Science and Technology of the Japanese Government [20350028]
  3. Grants-in-Aid for Scientific Research [22550067] Funding Source: KAKEN

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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.

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