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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (17): 1633-1637. 上一篇    下一篇

研究简报

新型一维链状配位聚合物新型一维链状配位聚合物{[Cu2(dhbd)(bipy)2]•10H2O}n的研究

李东升1 2，王尧宇*1，刘萍1，栾新军1，周彩华1 2，史启祯1   

  1. (1西北大学化学系 陕西省物理无机化学重点实验室 西安 710069)
    (2延安大学化学化工学院 功能材料研究所 陕西省化学反应工程重点实验室 延安 716000)
  • 投稿日期:2005-01-27 修回日期:2005-07-20 发布日期:2010-12-10
  • 通讯作者: 王尧宇

Study on a Novel 1D Polymeric Complex {[Cu2(dhbd)(bipy)2]•10H2O}n

LI Dong-Sheng1,2,WANG Yao-Yu*1,LIU Ping1
LUAN Xin-Jun1,ZHOU Cai-Hua1,2,SHI Qi-Zhen1   

  1. (1 Shaanxi Key Laboratory of Physico-Inorganic Chemistry, Department of Chemistry, Northwest University, Xi'an 710069)
    (2 Institute of Functional Materials, Shaanxi Key Laboratory of Chemical Reaction Engineering, Department of Chemistry and Chemical Engineering, Yanan University, Yan'an 716000)
  • Received:2005-01-27 Revised:2005-07-20 Published:2010-12-10
  • Contact: WANG Yao-Yu

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采用水热法合成了标题配位聚合物{[Cu2(dhbd)(bipy)2]•10H2O}n (H4dhbd＝2,3-二羟基丁二酸, bipy＝2,2'-联吡啶), 通过元素分析、红外光谱、热分析、X射线单晶衍射等技术对其进行了表征．配合物属单斜晶系, 空间群C2/c, a＝2.1965(4) nm, b＝1.0671(2) nm, c＝1.3662(3) nm, β＝93.50(3)°, Z＝4, R＝0.0388．晶体的基本构建基元包含10个结晶H2O分子和由两个Cu(II)原子、一个采用双二齿螯合配位的2,3-二羟基丁二酸根、两个2,2'-联吡啶形成具有C2旋转轴的U形双核单元, 相邻的两个方向相反的U形双核单元通过双羧基O桥联形成沿c轴延伸的一维链; 链间籍C—H…O和O—H…O氢键扩展为三维结构．配合物中呈现了一种2,3-二羟基丁二酸与过渡金属配位的新方式．

关键词: 2,3-二羟基丁二酸铜(II), 配位聚合物, 配位方式, 水热合成, 晶体结构

The title complex {[Cu2(dhbd)(bipy)2]•10H2O}n (H4dhbd＝2,3-dihydroxybutanedioate tetraanion, bipy＝2,2′-bipyridine) has been hydrothermally synthesized and characterized by means of elemental analysis, IR, TG-DSC and single crystal X-ray diffraction. The results show that the complex is monoclinic, with space group C2/c, a＝2.1965(4) nm, b＝1.0671(2) nm, c＝1.3662(3) nm, β＝93.50(3)°, Z＝4 and R＝0.0388. The crystal structure of complex consists of a U-shaped binuclear unit with C2 axis and ten water molecules, in which the U-shaped unit is made of two Cu(II) nuclei with one tetraanionic dhbd adopting bis didentate coordination mode and two 2,2'-bipy ligands, moreover, two coordination carboxy O atoms of dhbd group bridge the two neighboring reversed U-shaped frame to form a 1-D polymeric chain along the crystallographic axis c．These coordination polymer chains are further organized by two different intermolecular hydrogen bonds (C—H…O and O—H…O) to afford a 3D supramolecular structure. This binding mode of dhbd group was not observed so far．

Key words: copper(II) dihydroxybutanedioate, polymeric complex, coordination mode, hydrothermal synthesis, crystal structure