Magnetic and photo-magnetic properties of Co dinuclear complexes
Magnetic and photo-magnetic properties of Co dinuclear complexes
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DOI：
10.1016/j.ica.2008.03.089
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发表时间：
2008-09
影响因子：
2.8
通讯作者：
O. Sato;Satoshi Miura;Hiroyuki Maruyama;Yan-juan Zhang;Dayu Wu;W. Zhang;Haitao Xu;R. Matsuda;Haoling Sun;J. Tao
中科院分区：
文献类型：
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作者：
O. Sato;Satoshi Miura;Hiroyuki Maruyama;Yan-juan Zhang;Dayu Wu;W. Zhang;Haitao Xu;R. Matsuda;Haoling Sun;J. Tao
研究了钴双核化合物的磁性和光磁性质。Co化合物[{Co（tpa）}2（dhbq）]（BF 4）3·2 H2O和[{Co（tpa）}2（dhbq）]（ClO 4）3·2 H2O在室温下具有结构[（tpa）CoIII-LS-（μ-dhbq）3−-CoIII-LS（tpa）]3−（其中LS、H2 dhbq、tpa分别表示低自旋、2，5-二羟基-1，4-苯醌和三（2-吡啶甲基）胺）。在加热时，这些化合物表现出价态互变异构体的相互转换; [（tpa）CoIII-LS-（μ-dhbq）3−-CoIII-LS（tpa）]3−-[（tpa）CoIII-HS-（μ-dhbq）2−-CoIII-LS（tpa）]3−（其中HS表示高自旋）。此外，这两种化合物在低温（<60 K）下均表现出光诱导的价态互变异构现象。这些结果表明，这些配合物的电子结构可以通过修改抗衡阴离子控制。
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 (<60K). These results show that the electronic structures of these complexes can be controlled by modifying the counter anions.