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首页> 外文期刊>Chemistry: A European journal >A promising Mg-II-ion-selective luminescent probe: Structures and properties of Dy-Mn polymers with high symmetry
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A promising Mg-II-ion-selective luminescent probe: Structures and properties of Dy-Mn polymers with high symmetry

机译：有前途的Mg-II-离子选择性发光探针：具有高对称性的Dy-Mn聚合物的结构和性质

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摘要

Two Dy-Mn polymers, {[Dy(L-1)(3)Mn-1.5(H2O)(3)](.)3.125H(2)O}(n) (1, L-1 = pyridine-2,6-dicarboxylic acid) and {[Dy(L-2)(3)Mn-1.5(H2O)(6)]8.25H(2)O}(n) (2, L-2 = 4-hydroxylpyridine-2,6-dicarboxylic acid), with high symmetry (S-6) have been prepared. Polymer 1 has a nanoporous 3D framework with channel of about 17.6 angstrom diameter, while 2 has a honeycomb-type 2D structure with the cavity of approximately 14.4 angstrom diameter. In the construction of multidimensional porous polymers with 3d-4f mixed metals, it is the first observation that a ligand substituent effect leads to dramatic differences in the structures formed. Luminescent studies reveal that the emission intensities of 1 and 2 increase significantly upon the addition of Mg2+ whereas the introduction of other metal ions leaves the intensity unchanged or even weakens it; hence, both of them may serve as good candidates of Mg2+ luminescent probes. To our knowledge, complex 1 is also the first example of a 3d-4f metal-based nanoporous polymer to exhibit luminescent selectivity for Mg2+. Magnetic susceptibility measurements reveal a rather rare ferromagnetic interaction in 2. Thermal gravimetric analyses and powder X-ray diffraction investigations have also been performed, suggestive of high thermal stability of 1.
机译：两种Dy-Mn聚合物，{[Dy（L-1）（3）Mn-1.5（H2O）（3）]（。）3.125H（2）O}（n）（1，L-1 =吡啶-2 ，6-二羧酸）和{[Dy（L-2）（3）Mn-1.5（H2O）（6）] 8.25H（2）O}（n）（2，L-2 = 4-羟基lpyridine-2已经制备了具有高对称性的（6-6-二羧酸）（S-6）。聚合物1具有纳米孔3D骨架，其通道具有约17.6埃直径，而聚合物2具有蜂窝型2D结构，其腔具有约14.4埃直径。在具有3d-4f混合金属的多维多孔聚合物的构造中，首次观察到配体取代基效应导致所形成结构的巨大差异。发光研究表明，加入Mg2 +后1和2的发射强度显着增加，而引入其他金属离子则使强度不变甚至减弱。因此，它们都可以作为Mg2 +发光探针的良好候选者。据我们所知，配合物1也是3d-4f金属基纳米多孔聚合物的第一个实例，对Mg2 +具有发光选择性。磁化率测量显示2中有相当罕见的铁磁相互作用。还进行了热重分析和粉末X射线衍射研究，这表明1的高热稳定性。

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