Magnetic and photo-magnetic properties of Co dinuclear complexes

作者：Sato Osamu^*; Miura Satoshi; Maruyama Hiroyuki; Zhang Yanjuan; Wu Dayu; Zhang Wen; Xu Haitao; Matsuda Ryotaro; Sun Haoling; Tao Jun

来源：Inorganica Chimica Acta, 2008, 361(12-13): 3659-3662.

DOI：10.1016/j.ica.2008.03.089

• valence tautomerism
• photo-induced electron transfer
• long lifetime

The magnetic and photo-magnetic properties of Co dinuclear compounds were studied. The Co compounds, [{Co(tpa)}(2)(dhbq)](BF(4))(3) center dot 2H(2)O and [{Co(tpa)}(2)(dhbq)](ClO(4))(3) center dot 2H(2)O, have the structure [(tpa)Co(III-LS)-(mu-dhbq)(3) -Co(III-LS)(tpa)](3) (where LS, H(2)dhbq, 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)Co(III-LS) -(mu-dhbq)(3) -Co(III-LS)(tpa)](3) reversible arrow [(tpa)Co(II-HS)-(mu-dhbq)(2) -Co(III-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.

• 出版日期2008-9-1
• 单位厦门大学; 北京师范大学