Slow magnetic relaxation in lanthanide complexes with chelating nitronyl nitroxide radical.
Slow magnetic relaxation in lanthanide complexes with chelating nitronyl nitroxide radical.
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DOI：
10.1021/ic100008g
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发表时间：
2010-05
影响因子：
4.6
通讯作者：
Xiao-ling Wang;Licun Li;D. Liao
中科院分区：
文献类型：
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作者：
Xiao-ling Wang;Licun Li;D. Liao
合成了两个稀土自由基配合物[Ln（hfac）（3）NIT-2 Py].0.5C（7）H（16）[Ln = Tb（1），Dy（2）]，并对其结构和磁性进行了表征。这两种配合物是同晶型的，其中NIT-2 Py自由基以螯合方式与Ln（III）离子配位。磁性研究表明，复合物1显示出典型的单分子磁体的频率依赖性，交流磁化率，而在2中观察到缓慢的磁弛豫下施加的直流电场。
Two rare-earth radical complexes [Ln(hfac)(3)NIT-2Py].0.5C(7)H(16) [Ln = Tb (1), Dy (2)] have been synthesized and characterized structurally as well as magnetically. Both complexes are isomorphous, in which the NIT-2Py radical is coordinated to the Ln(III) ion in a chelating manner. Magnetic studies reveal that complex 1 shows a frequency-dependent, alternating-current magnetic susceptibility typical of a single-molecule magnet, whereas slow magnetic relaxation is observed in 2 under an applied direct-current field.