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2013 , Vol. 71 >Issue 05: 755 - 760

DOI: https://doi.org/10.6023/A13010121

研究论文

基于线性叠氮四核单元的系列二维化合物: 合成, 晶体结构及磁性

  • 李佐习 ,
  • 杨乾 ,
  • 李立存 ,
  • 胡同亮 ,
  • 卜显和
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  • 南开大学化学系 金属与分子基材料化学天津市重点实验室 天津 300071

收稿日期: 2013-01-24

  网络出版日期: 2013-03-26

基金资助

项目受国家自然科学基金(Nos. 21031002, 51073079)和天津市自然科学基金(No. 11JCYBJC04100)资助.

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A Series of 2D Coordination Polymers Based on Unprecedented Linear Tetranuclear Units Bridged by the Azido Anion: Syntheses, Crystal Structures and Magnetic Properties

  • Li Zuoxi ,
  • Yang Qian ,
  • Li Licun ,
  • Hu Tongliang ,
  • Bu Xianhe
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  • Department of Chemistry, and Tianjin Key Laboratory of Metal & Molecule-based Material Chemistry, Nankai University, Tianjin 300071

Received date: 2013-01-24

  Online published: 2013-03-26

Supported by

Project supported by the National Natural Science Foundation of China (Nos. 21031002, 51073079) and the Natural Science Fund of Tianjin, China (No. 11JCYBJC04100).

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摘要

分子磁体的设计与合成一直是当今物理和化学的热门研究课题. 受分子磁体启发, 通过引入叠氮磁耦合基团以及长链棒状配体4,4'-二咪唑联苯(L), 我们构筑了三个磁性化合物[Co2(N3)4(L)2.5]∞(1), [Ni2(N3)3(NO3)(L)2.5]∞(2)和[Mn2(N3)4(L)2.5]∞(3). 结构分析显示, 这是三个同构化合物, 展现了一种基于线性叠氮四核单元的二维层网络. 有意义的是, 这种线性叠氮四核单元还未曾被人报道. 磁性研究表明, 三个化合物都是铁磁耦合, 这是由于EO-叠氮所导致的. 通过拟合实验数据, 我们得到了三个化合物的磁耦合常数, 进一步验证了上面磁构相关性的讨论.

关键词： 配位聚合物; 棒状配体; 线性四核簇; 磁性

本文引用格式

李佐习 , 杨乾 , 李立存 , 胡同亮 , 卜显和 . 基于线性叠氮四核单元的系列二维化合物: 合成, 晶体结构及磁性[J]. 化学学报, 2013 , 71(05) : 755 -760 . DOI: 10.6023/A13010121

Abstract

Sparked by the strategy of molecular magnets, three magnetic coordination polymers, [Co2(N3)4(L)2.5]∞ (1), [Ni2(N3)3(NO3)(L)2.5]∞ (2) and [Mn2(N3)4(L)2.5]∞ (3) (L=4,4'-bis(imidazol-1-yl)biphenyl), have been synthesized by employing azide as the coupling carrier and a rod-like ligand L as the magnetic insulator. Structural analysis indicates that complexes 1～3 are iso-structural, and illustrate a 2D (4,4) layer based on unprecedented linear tetranuclear units bridged by the EO-azido ions. Their magnetic measurements revealed that complexes 1～3 all present the ferromagnetic (FM) coupling, which was due to the EO-azido linker. The corresponding exchange coupling constants have been estimated by fitting the experimental data, which confirmed the above magneto-structural correlations.

Key words： coordination polymer; rod-like ligand; linear tetranuclear cluster; magnetic property

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