高等学校化学学报

高等学校化学学报

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[Zn2(C7H8O6)2(bipy)2(H2O)2]·4H2O手性配位聚合物的合成与晶体结构

孟祥华, 施继成, 童庆松, 杨玉蓉, 贾莉   

  1. 福建师范大学化学与材料科学学院, 福州 350007
  • 收稿日期:2008-01-24 修回日期:1900-01-01 出版日期:2008-06-10 发布日期:2008-06-10
  • 通讯作者: 施继成

Synthesis and Crystal Structure of a Novel Chiral Coordination Polymer [Zn2(C7H8O6)2(bipy)2(H2O)2]·4H2O

MENG Xiang-Hua, SHI Ji-Cheng*, TONG Qing-Song, YANG Yu-Rong, JIA Li   

  1. College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, China
  • Received:2008-01-24 Revised:1900-01-01 Online:2008-06-10 Published:2008-06-10
  • Contact: SHI Ji-Cheng

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摘要： 采用溶剂热技术合成了一种新型手性配位聚合物[Zn2(C7H8O6)2(bipy)2(H2O)2]·4H2O(C7H8O6=2,3-氧-异丙叉基-L-酒石酸根, bipy=4,4'-联吡啶), 并通过单晶X射线衍射结构分析、元素分析、热重分析以及红外光谱进行了表征. 结构分析数据表明, 该化合物属单斜晶系, C2空间群, 晶胞参数a=2.02334(14) nm, b=1.13896(4) nm, c=1.01094(6) nm, β=117.366(3)°, V=2.0689(2) nm3. 两个晶体学独立的Zn原子均为八面体构型, 其中Zn1原子赤道配位点被2个酒石酸根中的4个羧酸根氧螯合配位, 2个酒石酸根中剩下的4个羧酸根氧中的2个分别与2个Zn2原子连接形成无限一维链, Zn2原子的另外2个反式赤道配位点被2个水分子氧占据, 同时这两种Zn原子的轴向配位点均被4,4'-联吡啶的氮原子占据, 形成具有矩形格子[0.51165(3) nm×1.13896(5) nm]的二维层状结构, 游离的2个水分子通过氢键作用形成二聚体, 并与酒石酸根中未与Zn配位的羧酸氧连接, 把二维层状结构连接成三维网状的超分子结构.

关键词: Zn(Ⅱ), 2,3-氧-异丙叉基-L-酒石酸根, 配位聚合物, 氢键

Abstract: A novel chiral coordination polymer, [Zn2(C7H8O6)2(4,4'-bipy)2(H2O)2]·4H2O(C7H8O6=2,3-O-isopropylidene-L-tartrate, bipy=4,4'-bipyridine), was synthesized via a solvothermal reaction and characterized by elemental analyses, TG, IR and single crystal X-ray diffraction. The analysis results of crystal structure show that the complex is monoclinic with space group C2, a=2.02334(14) nm, b=1.13896(4) nm, c=1.01091(6) nm, β=117.366(3)°, V=2.0689(2) nm3. Both crystallographically unique Zn atoms exit as an octahedral geometry. The four equatorial positions of Zn1 atom are occupied by the carboxylate-oxygen atoms of the two tartrates, and the two oxygens of the left four carboxylate-oxygen atoms coordinate to two different Zn2 atoms, respectively, forming infinite coordination polymer chains. The left two of the trans equatorial positions of Zn2 atom are completed with two oxygen atoms of two water molecules. The axial positions of both Zn atoms are occupied by the nitrogen atoms from different 4,4'-bipyridine molecules to give a 2D rectangular-grid layers with a cavity dimension of 0.51165(3)nm×1.13896(5) nm. A three dimensional network is formed by the crystallization water chains joined by the carboxylate-oxygen atoms through hydrogen-bonding interactions.

Key words: Zn(Ⅱ), 2,3-O-isopropylidene-L-tartrate, Coordination polymer, Hydrogen bonding

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