| 三个镧系金属氮氧自由基配合物的合成、结构及磁性 | |
| Three Lanthanide Nitronyl Nitroxide Radical Compounds: Synthesises, Structures and Magnetic Properties | |
| 摘要: 以氮氧自由基为配体，合成了3例氮氧自由基-稀土三自旋单核配合物[Ln（hfac）3（NIT-Ph-4-Br）2]（Ln=Gd（1），Tb（2），Dy（3），hfac=六氟乙酰丙酮，NIT-Ph-4-Br=4，4，5，5-四甲基-2-（4'-溴）-咪唑啉-3-氧化-1-氧基自由基。单晶结构分析表明3个配合物均属单斜晶系P21/c空间群，配合物中的Ln(Ⅲ)离子为八配位模式，并且拥有相似的自由基-稀土-自由基单核结构。对配合物的磁性测试结果表明，配合物1中自由基与Gd(Ⅲ)离子之间存在着铁磁相互作用，自由基与自由基之间存在着反铁磁相互作用；配合物2，3中，稀土离子与自由基之间存在弱的反铁磁相互作用 | |
| 关键词: 氮氧自由基|稀土|晶体结构|磁性 | |
| 基金项目: 内蒙古自然科学基金（No.2016BS0206）、广东省教育厅青年创新人才项目（No.CQ2014064）和广东省大创项目（No.201510580046，201610580046）资助。 | |
| Abstract: Three lanthanide-nitronyl nitroxide radical compounds[Ln(hfac)3(NIT-Ph-4-Br)2] (Ln=Gd(1), Tb(2), Dy(3), hfac=hexafluoroacetylacetonate, NIT-Ph-4-Br=2-(4'-bromide)-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide) have been successfully prepared and characterized by single crystal X-ray diffraction, IR spectroscopy and elemental analyses. Single crystal X-ray crystallographic analyses reveal that all these three compounds are isostructural and crystallize in the P21/c space group, which are composed of one Ln(hfac)3 unit and two NIT-Ph-4-Br radicals. Magnetic studies reveal that ferromagnetic interactions and antiferromagnetic interactions coexist in Gd complex and there are very weak ferromagnetic interactions between Ln(Ⅲ) ions and the coordinated nitronyl nitroxide in Tb complex and Dy complex. CCDC:1496095, 1; 1496096, 2; 1496097, 3. | |
| Keywords: nitronyl nitroxide radical|lanthanides|crystal structure|magnetic properties | |
| 投稿时间：2016-08-13 修订日期：2016-11-09 | |
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| 胡鹏,高媛媛,肖凤仪,邓肖娟,黄国洪,张淼,苏芬,王莉娜.三个镧系金属氮氧自由基配合物的合成、结构及磁性[J].无机化学学报,2017,33(1):33-40. | |
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