广西师范大学学报(自然科学版) ›› 2013, Vol. 31 ›› Issue (2): 69-75.

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氢键导向的三维超分子结构{[Co(4,4'-bipy)(H2O)4](pda)2(H2O)2}n的合成及晶体结构(pda-=2-甲基苯并咪唑-1,3-二乙酸根)

曾建强, 梁光明, 黄瑛达, 杨坤国, 桂柳成, 倪青玲   

  1. 广西师范大学化学化工学院,广西桂林541004
  • 收稿日期:2012-12-09 出版日期:2013-06-20 发布日期:2018-11-26
  • 通讯作者: 倪青玲(1964—),女,广西全州人,广西师范大学副教授。E-mail:niql123@sina.com
  • 基金资助:
    国家自然科学基金资助项目(21202024,21201045);广西自然科学基金资助项目(2010GXNSFF013001)

Hydrogen-bonding Directed Three-dimensional Supramolecular Structure in Catena-((μ2-4,4'-bipyridine)-tetraaqua-cobalt(Ⅱ) bis (2-methylbenzimidazolium-1,3-diacetate) dehydrate): Synthesis and Crystal Structural Characterization

ZENG Jian-qiang, LIANG Guang-ming, HUANG Ying-da, YANG Kun-guo, GUI Liu-cheng, NI Qing-ling   

  1. College of Chemistry and Chemical Engineering,Guangxi Normal University,Guilin Guangxi 541004,China
  • Received:2012-12-09 Online:2013-06-20 Published:2018-11-26

摘要: 标题化合物{[Co(4,4'-bipy)(H2O)4](pda)2(H2O)2}n由醋酸钴、3-羧甲基-1,3-(2-甲基苯并咪唑基)-1-乙酸(Hpda)和4,4'-联吡啶通过水热反应而得。X射线单晶衍射分析显示该化合物的不对称单元含有半个Co2+离子、半个4,4'-联吡啶分子、1个抗衡阴离子pda-、2个配位水分子和1个结晶水分子。标题配合物中Co2+被4,4'-联吡啶分子桥联形成一维链{[Co(4,4'-bipy)]}n,同时4个配位水分子和来自不同4,4'-联吡啶分子中的2个氮原子与Co2+配位形成六配位的八面体结构。在固态结构里,抗衡阴离子pda-、配位水和结晶水分子通过O—H…O氢键作用构筑形成二维波浪形状的氢键结构,同时相邻二维氢键层被4,4'-联吡啶分子进一步以柱状连接形成拥有一维通道的三维超分子结构。

关键词: 配位聚合物, 超分子, 氢键, 晶体结构

Abstract: The title compound,{[Co(4,4'-bipy)(H2O)4](pda)2(H2O)2}n,was obtained by the hydrothermal reaction of cobalt acetate with 3-carboxymethyl-1,3-(2-methylbenzimidazolium)-1-acetate (Hpda) and4,4'-bipyridine (4,4'-bipy).X-ray single crystal diffraction shows that the asymmetric unit of the title compound contains half a Co2+ ion,half a 4,4'-bipy molecule,one counter anion pda-,two coordinated water molecules andone lattice water molecule.Co2+ ions are bridged by 4,4'-bipy moleculesresulting in a one-dimensional coordination chain,{[Co(4,4'-bipy)(H2O)4]2+}n,in which Co2+ center is six-coordinated by two nitrogen atoms from different 4,4'-bipy molecules and four oxygen atoms from coordinated water molecules.In the solid state,two-dimensional undulating layers are constructed through hydrogen bonds between pda- anions,coordinated water and crystallization water molecules,while neighboring hydrogen-bonding layers are further pillared by 4,4'-bipy into a three-dimensional supramolecular structure which contains one-dimensional channels.

Key words: coordination polymer, supramolecule, hydrogen bond, crystal structure

中图分类号: 

  • O641.4
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