ZnII Coordination Poylmers Based on 2,3,6,7-Anthracenetetracarboxylic Acid: Synthesis, Structures, and Luminescence Properties

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• 作者：Ze Chang ; Ai-Shun Zhang ; Tong-Liang Hu ; Xian-He Bu
• 刊名：Crystal Growth & Design
• 出版年：2009
• 出版时间：November 4, 2009
• 年：2009
• 卷：9
• 期：11
• 页码：4840-4846
• 全文大小：997K
• 年卷期：v.9,no.11(November 4, 2009)
• ISSN：1528-7505

文摘

In our efforts to investigate polydentate ligands bearing bulky backbones, we used a bulky ligand, 2,3,6,7-anthracenetetracarboxylic acid (H₄ata), to react with Zn^II ions under different conditions, yielding four new coordination polymers, {[Zn(ata)_0.5(DMF)(H₂O)]·DMF·H₂O}_n (1), {[Zn(ata)_0.5(4,4′-bipy)_0.5(DMF)]·DMF}_n (2), {[Zn(ata)_0.5(azpy)_0.5(DMF)]·DMF}_n (3), and {[Zn(ata)_0.5(4,4′-bipy)(DMAC)]·(DMA)_0.5}_n (4) (DMF = N,N-dimethylformamide, 4,4′-bipy = 4,4′-bipyridine, azpy = 4,4′-azopyridine, DMAC = N,N-dimethylacetamide, DMA = dimethylamine), which were characterized by IR and single crystal X-ray diffraction. Complex 1 forms a two-dimensional (2D) network with (4,4) topology assembled by ata⁴⁻ ligands and Zn^II ions. Complexes 2 and 3 are three-dimensional (3D) frameworks with {8³}₂{8⁵;10} topology containing infinite 2D networks pillared by 4,4′-bipy and azpy, respectively. Complex 4 takes a 2D structure with (4,4) net containing infinite one-dimensional chains constructed by Zn^II ions with 4,4′-bipy and ata⁴⁻ ligands. These results show that the reaction of 2,3,6,7-anthracenetetracarboxylic acid with Zn^II in DMF tends to yield a layer structure which could be pillared by bipyridine-like ligands into 3D frameworks, and the final structure of the coordination polymer is greatly influenced by the solvent. Furthermore, the luminescence properties of 1−4 were studied in the solid state at room temperature.