A family of lanthanide–nitronyl nitroxide complexes: syntheses, crystal structures and magnetic properties
A family of lanthanide–nitronyl nitroxide complexes: syntheses, crystal structures and magnetic properties
复制标题
DOI：
10.1039/c2ce25116g
复制
发表时间：
2012-06
期刊：
影响因子：
3.1
通讯作者：
Yali Wang;Yuan-Yuan Gao-Yuan;Yue Ma;Qinglun Wang;Licun Li;D. Liao
中科院分区：
文献类型：
--
作者：
Yali Wang;Yuan-Yuan Gao-Yuan;Yue Ma;Qinglun Wang;Licun Li;D. Liao
合成了七种基于新型硝基氮氧化物自由基的Ln（III）配合物，并对其结构和磁性进行了表征：[Ln(hfac)3(NITNapOMe)2] (Ln = Pr(1), Gd(2), Tb(3), Dy(4), Ho(5), Er(6), Tm(7)；六氟乙酰丙酮；NITNapOMe = 2-6 ' -甲氧基-2 ' -萘-4,4,5,5-四甲基咪唑-1-氧基-3-氧化物)。单晶分析表明，这些配合物具有相似的单核三自旋结构，其中心Ln（III）离子由3个hfac分子和2个NITNapOMe自由基配位。变温磁化率研究揭示了配合物3、4和7中Ln（III）离子与自由基之间的铁磁相互作用以及配合物1、2、5和6中的反铁磁相互作用。
Seven Ln(III) complexes based on a novel nitronyl nitroxide radical have been synthesized and characterized structurally and magnetically: [Ln(hfac)3(NITNapOMe)2] (Ln = Pr(1), Gd(2), Tb(3), Dy(4), Ho(5), Er(6), Tm(7); hfac = hexafluoroacetylacetonate; NITNapOMe = 2-6′-methoxy-2′-naphthyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide). The single-crystal analyses show that these complexes have similar mononuclear tri-spin structures, in which central Ln(III) ions are eight coordinated by three hfac molecules and two NITNapOMe radicals. The variable-temperature magnetic susceptibility studies reveal the ferromagnetic interactions between Ln(III) ion and radicals in complexes 3, 4, and 7 and antiferromagnetic interactions in complexes 1, 2, 5, and 6.