高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (5): 729-737.doi: 10.7503/cjcu20160908

• 研究论文: 无机化学 • 上一篇    下一篇

两个基于氢键构筑的超分子镁配合物的合成、 晶体结构及荧光性质

孙佳音, 卢可, 刘广志, 刘璐, 潘文蓉, 张思静, 秦伟, 吴根华()   

  1. 安庆师范大学化学化工学院, 光电磁功能材料安徽省重点实验室, 安庆 246011
  • 收稿日期:2016-12-16 出版日期:2017-05-10 发布日期:2017-04-18
  • 作者简介:联系人简介: 吴根华, 男, 教授, 主要从事功能配合物研究. E-mail:wugenh@aqtc.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 21401005, 21171008, 51404014)资助

Syntheses, Crystal Structures and Luminescent Properties of Two Magnesium(Ⅱ) Supramolecular Architectures Based on Hydrogen Bonds

SUN Jiayin, LU Ke, LIU Guangzhi, LIU Lu, PAN Wenrong, ZHANG Sijing, QIN Wei, WU Genhua*()   

  1. Anhui Key laboratory of Functional Coordination Compounds, School of Chemistry and Chemical Engineering, Anqing Normal University, Anhui 246011, China
  • Received:2016-12-16 Online:2017-05-10 Published:2017-04-18
  • Contact: WU Genhua E-mail:wugenh@aqtc.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21401005, 21171008, 51404014)

摘要:

以5,6-苯并咪唑二酸(H3bidc)为有机配体, 在水热条件下通过控制反应温度得到了2个镁配合物[Mg(Hbidc)(H2O)4](1) 和 [Mg(Hbidc)(H2O)5]·4H2O(2). 通过单晶及粉末X 射线衍射、 红外光谱、 元素分析和热重分析对配合物进行了表征. 结果表明, 配合物1和2均为单核分子, 分别以不同的堆积方式通过氢键构筑成三维超分子结构. 值得注意的是, 配合物2的结构中捕获了由氢键连接的环状四聚体水簇(H2O)4. 配合物1和2的电荷布居分析结果与晶体结构的讨论一致. 此外, 固体荧光分析表明, 配合物1和2在室温下具有较强的蓝光发射.

关键词: Mg(Ⅱ)配合物, 反应温度, 氢键, 荧光寿命

Abstract:

Two structurally diverse magnesium centered complexes with formula [Mg(Hbidc)(H2O)4](1) and [Mg(Hbidc)(H2O)5]·4H2O(2), constructed from multidentate ligand 1H-benzimidazole-5,6-dicarboxylic acid(H3bidc), were synthesized under hydrothermal conditions with identical reactants at different temperatures. The complexes were characterized by Fourier transform infrared(FTIR) spectroscopy, elemental analysis, thermogravimetric analysis(TGA), and powder and single-crystal X-ray diffraction(XRD) analyses. Complexes 1 and 2 both display neutral mononuclear structures, and their distinct crystal packing patterns are driven by strong intra- or inter-molecular hydrogen bonds. Interestingly, unprecedented hydrogen-bonded cyclic tetrameric water clusters(H2O)4 are observed in complex 2. In addition, luminescent studies show that the title compounds exhibit intense blue fluorescence emissions at room temperature in the solid state.

Key words: Magnesium(Ⅱ) complex, Reaction temperature, Hydrogen bond, Fluorescence lifetime

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