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合成了铜(II)与羟基丁二酸和2,2′-联吡啶形成的配位聚合物{[Cu(malate)(2,2′-bipy)]?3H2O}∞(其中malate=羟基丁二酸根,2,2’-bipy=2,2’-联吡啶),通过X射线衍射测定了单晶结构,并进行了元素分析、红外光谱、紫外光谱、热分析等研究.配合物属单斜晶系,空间群P2(1)/c;晶胞参数a=0.70132(10)nm,b=1.9730(3)nm,c=1.18998(16)nm,β=94.551(3)°;Z=2;最终偏离因子R=0.0483.配合物中每个铜(II)原子与来自2,2’-联吡啶的两个氮原子和两个羟基丁二酸根的三个氧原子配位,形成畸变的三角双锥结构单元.每个羟基丁二酸根以R构型方式桥联两个三角双锥结构单元,沿a轴方向无限延伸形成一维链.两条平行链以面对面的方式重叠,彼此吡啶环之间存在强的π-π相互作用,加之C吡啶环—H…O羧基弱相互作用形成新颖的梯状双链结构,比邻的梯状双链又通过分子间O羟基—H…O羧基氢键沿a轴方向共同构筑了具有隧道的三维结构.
The coordination polymer {[Cu (malate) (2,2’-bipy)] 3H2O} ∞ which is formed by copper (II) and hydroxysuccinic acid and 2,2’- 2,2’-bipy = 2,2’-bipyridyl) was synthesized and its single crystal structure was determined by X-ray diffraction. Elemental analysis, FTIR, UV spectroscopy and thermal analysis were also performed. A = 0.70132 (10) nm, b = 1.9730 (3) nm, c = 1.18998 (16) nm, β = 94.551 (3) °; Z = 2 and a final deviation factor of R = 0.0483. Each copper (II) atom in the complex coordinates with three oxygen atoms from the two nitrogen atoms of 2,2’-dipyridyl and the two hydroxysuccinates to form a distortion Of triangular double cone structure units, each hydroxyl succinate bridging two triangular double cone structure units in an R configuration, extending infinitely along the a-axis direction to form a one-dimensional chain.The two parallel chains overlap in a face-to-face manner, Pyridine ring there is a strong π-π interaction, coupled with the C pyridine ring-H ... O carboxyl weak interaction to form a novel ladder-like double-stranded structure, the adjacent ladder-like double-stranded through the O-hydroxy-OH Carboxyhydrogen bonds along the a-axis direction together to build a tunnel Dimensional structure.