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一个新的四自旋氮氧自由基-镍(Ⅱ)配合物的合成、结构和磁性质 被引量：1

Synthesis,Crystal Structure and Magnetic Properties of a New Four-spin Nitroxide Radical-Ni(Ⅱ) Complex
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摘要 采用甲基嘧啶基取代的Ullman氮氧自由基2M5PmyNIT与过渡金属镍(Ⅱ)离子进行配位,得到了一个双核的四自旋配合物[Ni(hfac)2]2(2M5PmyNIT)2.2CHCl3(其中2M5PmyNIT=2-(2′-甲基-5′-嘧啶基)-4,4,5,5-四甲基咪唑啉-3-氧化-1-氧基自由基,hfac=1,1,1,5,5,5-六氟乙酰丙酮).X-射线单晶衍射分析表明,在一个分子中,2个2M5PmyNIT自由基作为桥联配体,连接了2个Ni(hfac)2单元,形成双核四自旋配合物.变温磁化率的研究表明,Ni(Ⅱ)离子和直接配位的氮氧自由基之间存在着强的反铁磁相互作用. A four-spin complex [Ni （hfac）2]2 （2M5PmyNIT）2 . 2CHCl2 （2M5PmyNIT = 2- （5＇ -2＇ - methylpyrimidyl ）-4,4,5,5-tetramethylimidazoline-l-oxyl-3-oxide, hfac = 1,1,1,5,5,5- hexafluoro- acetylaceonate） was synthesized using a methylpyrimidyl substituted nitroxide rad- ical. The single crystal X-ray analysis reveals that two 2M5PmyNIT radicals act as bridging ligand linking two Ni（hfac）2 units together. The magnetic study shows that there exists strong magnetic interaction between Ni（ Ⅱ ） ions and directly bonded radicals.
作者 王超 王亚丽 马越 廖代正
机构地区 南开大学化学系
出处 《南开大学学报（自然科学版）》 CAS CSCD 北大核心 2012年第2期100-104,109,共6页 Acta Scientiarum Naturalium Universitatis Nankaiensis
基金 国家自然科学基金(90922032 21101096) 天津市自然科学基金(09JCYBJC05500) 中央高校基本科研业务费专项资金资助 高等学校博士点基金(20100031120013)
关键词 氮氧自由基 镍(Ⅱ) 晶体结构 磁性 nitronyl nitroxide radical nickle（ Ⅱ） crystal structure magnetic properties
分类号 O614 [理学—无机化学]
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参考文献23

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同被引文献30

  • 1Lemaire M T. Recent Developments in the Coordination Chemistry of Stable Free Radicals[J].Pure and Applied Chemistry,2004,(02):277-293.doi:10.1351/pac200476020277.
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  • 3Ruiz-Molina D,Sporer C,Wurst K. Spin Frustration in a Dimeric Mn Complex with a Metallocene-Substituted α-Nitronyl Nitroxide Radical[J].Angewandte Chemie International Edition,2000,(20):3688-3691.doi:10.1002/1521-3773(20001016)39:20<3688::AID-ANIE3688>3.0.CO;2-6.
  • 4Luneau D,Borta A,Chumakov Y. Molecular Magnets Based on Two-Dimensional Mn(Ⅱ)-Nitronyl Nitroxide Frameworks in Layered Structures[J].Inorganica Chimica Acta,2008,(12/13):3669-3676.doi:10.1016/j.ica.2008.03.109.
  • 5Tsukuda T,Suzuki T,Kaizaki S. Synthesis,Spectroscopic and Magnetic Properties of Lanthanide Complexes with a Chelated Imino Nitroxide Radical[J].Journal of the Chemical Society,Dalton Transactions,2002.1721-1726.
  • 6Bernot K,Bogani L,Canesehi A. A Family of Rare-Earth-Based Single Chain Magnets:Playing with an Isotropy[J].Journal of the American Chemical Society,2006,(24):7947-7956.doi:10.1021/ja061101l.
  • 7Bogani L,Sangregorio C,Sessoli R. Molecular Engineering for Single-Chain-Magnet Behavior in a One-Dimensional Dysprosium-Nitronyl Nitroxide Compound[J].Angewandte Chemie International Edition,2005,(36):5817-5821.doi:10.1002/anie.200500464.
  • 8Poneti G,Bernot K,Rogani L. A Rational Approach to the Modulation of the Dynamics of the Magnetization in a Dysprosium-Nitronyl-Nitroxide Radical Complex[J].Chemical Communications,2007.1807-1809.
  • 9Luneau D,Rey P. Magnetism of Metal-Nitroxide Compounds Involving Bis-Chelating Imidazole and Benzimidazole Substituted Nitronyl Nitroxide Free Radicals[J].Coordination Chemistry Reviews,2005,(23):2591-2611.doi:10.1016/j.ccr.2005.06.008.
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南开大学学报（自然科学版）
2012年 第2期

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