Infinite chains constructed from flexible bis(benzimidazole)-based ligands
Infinite chains constructed from flexible bis(benzimidazole)-based ligands
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DOI：
10.1016/j.poly.2008.05.019
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发表时间：
2008-08
期刊：
影响因子：
2.6
通讯作者：
Hui Jiang;Ying‐Ying Liu;Jianfang Ma;Wen-Li Zhang;Jin Yang
中科院分区：
文献类型：
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作者：
Hui Jiang;Ying‐Ying Liu;Jianfang Ma;Wen-Li Zhang;Jin Yang
两个中性配体L1·2H2O和L2·H2O和七个配合物[Cu(PMB)2(L1)](1)，[Cu(PMB)2(L2)](2)，[Cu(Ac)2(L2)]·4H2O(3)，[Cu(4-ABA)2(L2)](4)，[Ag(4-ts)(L1)(H2O)](5)，[AG2(EPES)2(L1)]·2H2O(6)，[Ag(1，5-NDS)0.5(L2)]·0.5C2H5OH·H2O(7)[式L1=1，1′-(1，4-butanediyl)bis(2-methylbenzimidazole)；合成了对甲氧基苯甲酸阴离子；Ac=醋酸酯阴离子；4-L2=1，1′-(1，4-butanediyl)bis(2-ethylbenzimidazole)，=4-氨基苯甲酸阴离子；4-ts=对甲苯磺酸阴离子；epes=N-(2-hydroxyethyl)piperazine-N′-(2-ethanesulfonate)阴离子；1，5-NDS=1，5-萘二磺酸阴离子]，并用元素分析、红外光谱和单晶X-射线衍射法进行了表征。化合物1-7中的L1和L2配体作为桥联配体，将金属离子连接成链结构。化合物3、4和6中的链通过氢键相互交织，形成三维超分子结构。在化合物5中，相邻L1配体之间的π-π相互作用将链保持在超分子层上。在化合物7中，磺酸盐阴离子在骨架中起反离子的作用。讨论了3、6和7的热稳定性以及5-7在固体中的发光性质。
Two neutral ligands, L1·2H2O and L2·H2O, and seven complexes, [Cu(pmb)2(L1)] (1), [Cu(pmb)2(L2)] (2), [Cu(Ac)2(L2)]·4H2O (3), [Cu(4-aba)2(L2)] (4), [Ag(4-ts)(L1)(H2O)] (5), [Ag2(epes)2(L1)]·2H2O (6), [Ag(1,5-nds)0.5(L2)]·0.5C2H5OH·H2O (7) [where L1=1,1′-(1,4-butanediyl)bis(2-methylbenzimidazole); L2=1,1′-(1,4-butanediyl)bis(2-ethylbenzimidazole), pmb=p-methoxybenzoate anion; Ac=acetate anion; 4-aba=4-aminobenzoate anion; 4-ts=p-toluenesulfonate anion; epes=N-(2-hydroxyethyl)piperazine-N′-(2-ethanesulfonate) anion; 1,5-nds=1,5-naphthalenedisulfonate anion], have been synthesized and characterized by elemental analysis, IR, and single-crystal X-ray diffraction. The L1and L2ligands in compounds 1–7 act as bridging ligands, linking metal ions into chain structures. The chains in compounds 3, 4 and 6 interlace with each other by hydrogen bonds togenerate 3D supramolecular structures. In compound 5, π–π interactions between adjacent L1ligands hold the chains to a supramolecular layer. In compound 7, the sulfonate anions act as counterions in the framework. The thermal stabilities of 3, 6 and 7, and the luminescent properties for 5–7 in the solid states are also discussed.