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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.
The design and synthesis of molecular magnets has been a hot research topic in physics and chemistry.Due to the introduction of azide magnetic coupling groups and the long-chain rodlike ligand 4,4’-biimidazole biphenyl (L), inspired by molecular magnets, we Three magnetic compounds [Co2 (N3) 4 (L) 2.5] ∞ (1), [Ni2 (N3) 3 (NO3) 2.5] ∞ (3). Structural analysis shows that these are three isomorphic compounds that exhibit a two-dimensional network based on linear azide tetranuclear units. Significantly, this linear azide quadruplex unit Has not been reported.Microscopic studies have shown that all three compounds are ferromagnetic coupling, which is due to EO-azide.Through fitting the experimental data, we obtained the magnetic coupling constants of the three compounds, further verifying the above Discussion of Magnetic Correlation.