高等学校化学学报

高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (5): 680.

• 论文 • 上一篇    下一篇

稳定自由基与五氟丙酸稀土双核配合物的合成与性能研究

姜宗慧, 张伟, 廖代正, 还振威, 祁玉清, 王耕霖   

  1. 南开大学化学系, 天津 300071
  • 收稿日期:1995-07-26 出版日期:1996-05-24 发布日期:1996-05-24
  • 通讯作者: 姜宗慧,女,55岁,副教授.
  • 作者简介:姜宗慧,女,55岁,副教授.
  • 基金资助:

    国家自然科学基金

Synthesis and Properties of Rare Earth Pentafluoropropionate Binuclear Complexes with Stable Radical

JIANG Zong-Hui, ZHANG Wei, LIAO Dai-Zheng, HUAN Zhen-Wei, QI Yu-Qin, WANG Geng-Lin   

  1. Department of Chemistry, Nankai University, Tianjin 300071
  • Received:1995-07-26 Online:1996-05-24 Published:1996-05-24

PDF (PC)

被引次数

11

摘要： 合成并表征了5种以2-(4'-氯苯基)-4,4,5,5-四甲基-3-氧化-1-氧自由基咪唑桥联的新型五氟丙酸稀土(Nd,Gd,Dy,Ho,Er)双核配合物,由Nd(Ⅲ)、Dy(Ⅲ)、Ho(Ⅲ)和Er(Ⅲ)四种配合物的超灵敏跃迁,讨论了配合物的共价性随稀土离子原子序数增加而减弱的原因,对Gd(Ⅲ)配合物的变温(4～300K)磁化率数据通过用最小二乘法与理论磁化率拟合,得交换积分J为正值,表明配合物中Gd(Ⅲ)与自由基间存在弱的铁磁性相互作用。

关键词: 稳定自由基, 稀土双核配合物, 磁性

Abstract: Five new complexes of binuclear rare earth(Nd, Gd, Dy, Ho, Er)pentafluoropropionate with μ-2-(4'-chlorobenzoyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide were synthesized and characterized.According to hypersensitive transitions of the complexes (Nd(Ⅲ), Dy(Ⅲ), Ho(Ⅲ), Er(Ⅲ)), it was discussed that for the same ligand the covalency decreases as the atomic number of the rare earth metal atom increases, The observed variable-temperature(4～300 K)susceptibility data for Gd(Ⅲ)complex were fitted to those from theoretical magnetic equation by least-square method.The exchange integral, J, was found to be positive, indicating a weak ferromagnetic spin-exchange interaction between the radical and Gd(Ⅲ)ion.

Key words: Stable radical, Binuclear rare earth complexes, Magnetlsm

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