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Structure variation of mercury(II) halide complexes with different imidazole-containing ligands

机译:具有不同咪唑配体的卤化汞(II)配合物的结构变化

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摘要

A series of coordination complexes with different structures [Hg(iimb)I-2]center dot 0.5acetone (1), [Hg(bib)Br-2]center dot 0.5THF (2), [Hg(bib)I-2] (3), [Hg-3(tib)(2)I-6]center dot 2DMF (4), [Hg-3(timpt)(2)I-6]center dot 4H(2)O (5), [Hg-2(titmb)Br-4] (6), and [Hg-2(titmb)Cl-4] (7) were synthesized by reactions of mercury(II) halides with the corresponding imidazole-containing bidentate or tripodal ligands, namely, 1-(1-imidazolyl)-4-(imidazol-1-ylmethyl)benzene (iimb), 1-bromo-3,5-bis(imidazol-1-ylmethyl)benzene (bib), 1,3,5-tris(1-imidazolyl)benzene (tib), 2,4,6-tris[4-(imidazol-1-ylmethyl)phenyl]-1,3,5-triazine (timpt), and 1,3,5-tris(imidazol-1-ylmethyl)-2,4,6-trimethylbenzene (titmb), respectively. The structures of the complexes were determined by single-crystal X-ray diffraction analyses, and the results revealed that 1, 2, and 4-7 are one-dimensional (1D) chain coordination polymers with different shapes. In the case of 3, two metal atoms and two bib ligands form M2L2 binuclear rings, which are further connected by weak Hg center dot center dot center dot I interactions to form an infinite 1D chain. The different structures of the complexes showed the predominant influence of halides and organic ligands. In addition, the weak interactions such as Hg-X center dot center dot center dot Hg (X = I or Br), I center dot center dot center dot I interactions also play an important role in the formation of supramolecular architectures, for instance, to link low-dimensional entities to high-dimensional frameworks. Polycatenation of the 1D ladders was observed in 1 to give a three-dimensional architecture. The photoluminescence properties of the synthesized mercury(II) complexes were investigated in the solid state at room temperature.
机译:一系列具有不同结构的配位配合物[Hg(iimb)I-2]中心点0.5丙酮(1),[Hg(bib)Br-2]中心点0.5THF(2),[Hg(bib)I-2 ](3),[Hg-3(tib)(2)I-6]中心点2DMF(4),[Hg-3(timpt)(2)I-6]中心点4H(2)O(5) ,[Hg-2(titmb)Br-4](6)和[Hg-2(titmb)Cl-4](7)是通过卤化汞(II)与相应的含咪唑的二齿或三脚架反应合成的配体,即1-(1-咪唑基)-4-(咪唑-1-基甲基)苯(iimb),1-溴-3,5-双(咪唑-1-基甲基)苯(bib),1,3 ,5-三(1-咪唑基)苯(tib),2,4,6-三[4-(咪唑-1-基甲基)苯基] -1,3,5-三嗪(timpt)和1,3, 5-三(咪唑-1-基甲基)-2,4,6-三甲基苯(titmb)。通过单晶X射线衍射分析确定配合物的结构,结果表明1、2和4-7是具有不同形状的一维(1D)链状配位聚合物。在3的情况下,两个金属原子和两个Bib配体形成M2L2双核环,它们进一步通过弱的Hg中心点中心点中心点I相互作用连接在一起,形成无限一维链。配合物的不同结构显示出卤化物和有机配体的主要影响。此外,Hg-X中心点中心点中心点Hg(X = I或Br),I中心点中心点中心点I点等弱相互作用在超分子体系的形成中也起着重要作用,例如,将低维实体链接到高维框架。在1中观察到1D梯子的多级连接,从而给出了三维结构。在室温下以固态研究了合成的汞(II)配合物的光致发光特性。

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