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首页> 外文期刊>Crystal growth & design >Reversible anion exchanges of porous metal-organic frameworks: Syntheses and structures of silver complexes with novel rigid tripodal nitrogen ligands
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Reversible anion exchanges of porous metal-organic frameworks: Syntheses and structures of silver complexes with novel rigid tripodal nitrogen ligands

机译：多孔金属-有机骨架的可逆阴离子交换：具有新型刚性三脚架氮配体的银配合物的合成和结构

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摘要

Two novel new rigid tripodal arene core based nitrogen ligands, 1,3,5-tris(pyrazol-1-yl)benzene (L-1) and 1,3,5-tris-[p-(pyrazol-1-yl)phenyl]benzene (L-2), have been synthesized. Self-assembly of L-1 with silver(I) salts generated two three-dimensional porous supramolecular networks, {[(Ag3L2X2)-X-1]X}(n) (1, X = ClO4-; 2, X = NO3-), with a common (10,3)-a topology. L-2 reacts with silver nitrate, resulting in a one-dimensional chain which constructs a three-dimensional supramolecular network, {[Ag4L22-(NO3)(4)]center dot 2CH(3)OH}(n) (3), via hydrogen bonds. Three complexes have been structurally characterized. The anion exchanges were determined by IR spectroscopy, elemental analyses, and X-ray powder diffraction for complexes 1 and 2; the counteranions located in the cationic frameworks can be exchanged reversibly without destruction of the structures. This observation demonstrates that 1 and 2 can act as zeolite-like porous materials for anion exchange. The photoluminescent properties of 1,3,5-tris[p-(pyrazol-1-yl)phenyl] benzene and its silver complex 3 have been investigated; the results indicate that the intensity of the photoluminescent emission of the ligand can be influenced by coordination with silver ion. The influence of the ligand structure on the formation of the supramolecular construction is discussed.
机译：两个新颖的基于刚性三脚架芳烃核的新型氮配体，1,3,5-三（吡唑-1-基）苯（L-1）和1,3,5-三（[p-（吡唑-1-基）]已经合成了苯基]苯（L-2）。 L-1与银（I）盐的自组装生成两个三维多孔超分子网络，{[（（Ag3L2X2）-X-1] X}（n）（1，X = ClO4-; 2，X = NO3 -），具有常见的（10,3）-a拓扑。 L-2与硝酸银反应，形成一维链，该链构成了三维超分子网络，{[Ag4L22-（NO3）（4）]中心点2CH（3）OH}（n）（3），通过氢键。在结构上已经表征了三种复合物。通过IR光谱，元素分析和配合物1和2的X射线粉末衍射确定阴离子交换。位于阳离子骨架中的抗衡离子可以可逆地交换而不会破坏结构。该观察结果表明1和2可以充当沸石状多孔材料用于阴离子交换。研究了1,3,5-三[对-（吡唑-1-基）苯基]苯及其银配合物3的光致发光性能。结果表明，配体的光致发光发射强度可受到与银离子配位的影响。讨论了配体结构对超分子结构形成的影响。

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