Manipulating Slow Magnetic Relaxation by Light in a Charge Transfer {Fe2Co} Complex

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Some cyanide-bridged complexes are known for exhibiting slow magnetic relaxation behavior in a light-induced metastable state. Herein, an unexpected reverse effect is observed for the first time in the S= (Formula presented.) {FeII LS-CoIII LS-FeIII LS} (HS=high spin, LS=low spin) ground state of a novel V-shaped trinuclear cyanide-bridged {Fe2Co} complex. In this complex, light-switchable iron-cobalt charge transfer with repeatable off/on switching of slow magnetic relaxation is discovered upon alternating laser irradiation at 785 and 560 nm. An important characteristic of the present compound is that the S= (Formula presented.) ground state exhibits slow magnetic relaxation before irradiation, whereas this is accelerated after irradiation. This is different from the typical behavior, where the light-induced metastable state exhibits slow magnetic relaxation.

Original languageEnglish
Pages (from-to)3259-3263
Number of pages5
JournalChemistry - A European Journal
Issue number15
Publication statusPublished - Mar 12 2020

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Organic Chemistry


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