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2-(2-喹啉)氮氧自由基构筑的Ni(Ⅱ)异自旋配合物的合成、结构和性质研究

Synthesis,Crystal Structure and Properties of 2-(2-Quinolyl)nitronyl Nitroxide Ni(Ⅱ) Different-spin Complex
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摘要 采用2-(2-喹啉)氮氧自由基与过渡金属Ni(Ⅱ)配位,得到了一个Ni(Ⅱ)与自由基形成的双自旋配合物[Ni(hfac)_2(2-QNNN)],(其中2-QNNN=2-(2-喹啉基)-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).单晶X-射线衍射结果表明,配合物属三斜晶系,P_i空间群.晶胞参数a=1.350 8(3)nm,b=1.418 9(3)nm,c=1.817 8(4)nm,α=104.76(3)°,β=108.65(3)°,γ=90.03(3)°,其中每个Ni(Ⅱ)离子采取六配位模式处于八面体配位构型中,分别与两个六氟乙酰丙酮上的四个氧原子、氮氧自由基N一O基团上的一个氧原子以及氮氧自由基喹啉基团上的氮原子配位.变温磁化率研究表明,配合物中过渡金属Ni(Ⅱ)离子和自由基之间存在着强的反铁磁相互作用. The 2-(2-quinolyl)nitronyl nitroxide transition metal Ni(Ⅱ) complex of [Ni (hfac) 2 (2-QNNN) ], (2-QNNN = 2- (2-quinolyl)- 4,4,5,5-tetramethylimidazoline- 1-oxyl- 3-oxide, hfac = hexafluoroacetylacetonate), was synthesized and characterized structurally and magnetically. It crystallizes in the triclinic space group P1, with a=1.350 8(3)nm,b=1.418 9(3)nm,c=1.817 8(4)nm,α=104.76(3)°,β=108.65(3)°,γ=90.03(3)° Every Ni ( Ⅱ ) is coordinated by one 2-QNNN and two Mac in a octahedron environment, forming a two spin Ni-radical mononuclear complex [Ni(hfac)2(2-QNNN)]. The variable magnetic measurement shows that there is strong antiferromagnetic interaction between the radical and Ni ( Ⅱ) ion in the molecule.
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 2011年第4期81-86,共6页 Acta Scientiarum Naturalium Universitatis Nankaiensis
基金 国家自然科学基金(90922032) 国家基础研究973项目(2007CB815305) 天津市自然科学基金(09JCYBJC05500) 高等学校博士点基金(20100031120013) 中央高校基本科研业务费专项资金 南开大学"国家大学生创新性实验计划"项目(101005533)
关键词 喹啉 氮氧自由基 晶体结构 磁性 quinoline nitronyl nitroxide crystal structute magnetic propernes
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参考文献39

  • 1Cogne A, Laugier J, Luneau D, et al. Novel square planar copper( I ) complexes with imino or nitronyl nitroxide radicals exhibiting large ferro-and antiferromagnetic interactions[J]. Inorg Chem, 2000, 39 : 5 510-- 5 514. 被引量:1
  • 2Iwamura H, Inoue K, Hayamizu T. High-spin polynitroxide radicals as versatile bridging ligands for transition metal complexes with high ferri/ferromagnetic Tc[J]. Pure Appl Chem, 1996, 68: 243--252. 被引量:1
  • 3Caneschi A, Gatteschi D, Lalioti N, et al. Supramolecular interactions and magnetism of metal-radicals chains[J]. J Chem Soc, Dalton Trans, 2000:3 907--3 912. 被引量:1
  • 4Ruiz-Molina D, Sporer C, Wurst K, et al. Spin frustration in a dimeric Mn' complex with a metallocene-substituted a-nitronyl nitroxide radical[J]. Angew Chem Int Ed, 2000, 39:3 688--3 691. 被引量:1
  • 5Oshio H. Magnetic interactions in copper complexes with nitronyl and imino nitroxides[J]. Inorg Chim Aeta, 2001, 324: 188-193. 被引量:1
  • 6Tretyakov E V, Koreneva O V, Romanenko G V, et al. Synthesis, structure and magnetism of M(hfae)2 complexes with spin labelled amides[J]. Polyhedron, 2004, 23: 763--772. 被引量:1
  • 7Luneau D, Borta A, Chumakov Y, et al. Molecular magnets based on two-dimensional Mn( I )-nitronyl nitroxide frameworks in layered structures[J].Inorg Chim Acta, 2008, 361:3 669-3 676. 被引量:1
  • 8Vostrikova K E. High-spin molecules based on metal complexes of organic free radicals[J]. Coord Chem Rev, 2008, 252:1 409-1 419. 被引量:1
  • 9Sessoli R, Powell A K. Strategies towards single molecule magnets based on lanthanide ions[J]. Coord Chem Rev, 2009, 253:2 328--2 341. 被引量:1
  • 10Bernot K, Bogani L, Caneschi A, et al. A family of rare-earth-based single chain magnets: Playing with anisotropy [J]. J Am Chem Soc, 2006, 128:7 947-7 956. 被引量:1

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