Magnetic and photo-magnetic properties of Co dinuclear complexes

Osamu Sato, Satoshi Miura, Hiroyuki Maruyama, Yanjuan Zhang, Dayu Wu, Wen Zhang, Haitao Xu, Ryotaro Matsuda, Haoling Sun, Jun Tao

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7 Citations (Scopus)


The magnetic and photo-magnetic properties of Co dinuclear compounds were studied. The Co compounds, [{Co(tpa)}2(dhbq)](BF4)3 · 2H2O and [{Co(tpa)}2(dhbq)](ClO4)3 · 2H2O, have the structure [(tpa)CoIII-LS-(μ-dhbq)3--CoIII-LS(tpa)]3- (where LS, H2dhbq, tpa denote low-spin, 2,5-di-hydroxy-1,4-benzoquinone and tris(2-pyridylmethyl)amine, respectively) at room temperature. On heating, these compounds exhibit valence-tautomeric inter-conversion; [(tpa)CoIII-LS-(μ-dhbq)3--CoIII-LS(tpa)]3- ⇆ [(tpa)CoII-HS-(μ-dhbq)2--CoIII-LS(tpa)]3- (where HS denotes high-spin). Furthermore, both of these compounds exhibit photo-induced valence tautomerism at low temperature (<60 K). These results show that the electronic structures of these complexes can be controlled by modifying the counter anions.

Original languageEnglish
Pages (from-to)3659-3662
Number of pages4
JournalInorganica Chimica Acta
Issue number12-13
Publication statusPublished - Sept 1 2008

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry


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