摘要
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.
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 intermo- lecular 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.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2005年第17期1633-1637,F0008,共6页
Acta Chimica Sinica
基金
国家自然科学基金(No.20471048)
高等学校优秀青年教师教学科研奖励计划
陕西省自然科学基金(Nos.2001H01
2002B21)资助项目.
