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三维多孔配位聚合物{[Zn_2(mal)_2(4,4'-bipy)(H_2O)_2]·2(H_2O)_(0.25)}_∞(mal=丙二酸根)的合成、结构及性质研究
Synthesis, Crystal Structure and Properties of a 3D Porous Coordination Polymer {[Zn_2(mal)_2(4,4'-bipy)(H_2O)_2]·2(H_2O)_(0.25)}_∞ (mal=malonate)

作  者: ; ; ; ; ; ; ;

机构地区: 苏州大学化学化工学院江苏省有机合成重点实验室

出  处: 《化学学报》 2006年第24期2496-2500,共5页

摘  要: ZnO,丙二酸及4,4'-bipy按物质的量之比1∶3∶0.3溶于H2O和DMF混合溶剂中(体积比4∶1),形成的无色溶液在50℃反应3d,得到了标题化合物{[Zn2(mal)2(4,4'-bipy)(H2O)2]?2(H2O)0.25}∞(mal=丙二酸根),对其进行了元素分析、红外光谱和X射线衍射表征,测定了晶体结构.该聚合物属单斜晶系,P21/n空间群,a=0.71215(16)nm,b=1.8685(4)nm,c=0.73890(17)nm,β=91.486(5)°,V=0.9829(4)nm3,Z=4,Dc=1.811g/cm3,Mr=268.03,F(000)=542,μ=25.02cm-1.最终偏离因子R1=0.0499,wR2=0.1374.该化合物中Zn原子和三个丙二酸根中的4个O原子、一个水分子和4,4'-bipy的一个N原子配位,形成的ZnNO5八面体通过4,4'-bipy和丙二酸根桥联,组成一种新颖的三维多孔结构,其孔道中充填游离水分子.此外还研究了该聚合物的热性质. Reaction of ZnO, malonic acid, 4,4'-bipy (molar ratio is 1 : 3 :0.3) in H2O/DMF (V : V=4 : 1) at 50℃ for 3 d gave the title compound {[Zn2(mal)2(4,4'-bipy)(H2O)2]·2(H2O)0.25}∞ (mal=malonate). The compound was characterized by elemental analysis, IR spectrum and single-crystal X-ray diffraction. It crystalfizes in the monoclinic system, space group P21/n with a=0.71215(16) nm, b= 1.8685(4) nm, c= 0.73890(17) nm, β=91.486(5)°, V=0.9829(4) nm^3, Z=4, Dc= 1.811g/cm^3, Mr=268.03, F(000)= 542, μ= 25.02 cm^-1, R1=0.0499 and wR2=0.1374. The X-ray analysis revealed that the central Zn atom is octahedrally coordinated by four O atoms from three real ligands, one O atom from H2O and one N atom from 4,4'-bipy. The resulting ZnNO5 octahedron is bridged by 4,4'-bipy and malonate ligands, forming a novel 3D porous structure with its channels filled with water molecules. In addition, the thermal properties of the polymeric compound were also investigated.

关 键 词: 锌配合物 丙二酸根 联吡啶 晶体结构 合成 聚合物

领  域: [理学] [理学]

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