以Zn(NO3)2·6H2O和4,4'-(1-咪唑基亚甲基)二苯甲酸(H2IMB)为原料,在不同溶剂热条件下反应,得到2个结构不同的配合物[Zn(HIMB)2]n(1)和{[Zn(IMB)]·1.5H2O}n(2),对它们进行了X射线单晶衍射分析、元素分析、红外光谱分析、热重分析和粉末衍射.配合物1属于正交晶系,C222l空间群,a=0.935 2(3) nm,b=2.583 3(8) nm,c=1.396 4(4) nm,V=3.373 6(18) nm3,Z=4,Mr=707.98,Dc=1.394 g·cm-3,μ=0.786,F(000)=1 456,R1=0.048 6,wR2=0.120 1(I＞2σ(I).配合物2属于四方晶系,I41/acd空间群,a=1.853 5(2) nm,b=1.853 5(2) nm,c=4.309 7(5) nm,V=14.806(4) nm3,Z=32,M,=412.69,Dc=1.481 g·cm-3,μ=1.360,F(000)=6 752,R1=0.043 7,wR2=0.117 1(I＞2σ(I)).单晶结构分析显示,配合物1拥有二维二重贯穿聚索烃格子状层状结构,而配合物2具有三维二重贯穿(3,6)-连接(611.84)(63)2网状结构.结果说明了溶剂在配合物组装过程中起着非常重要的作用.此外,还研究了2个配合物的荧光性质.%Two zinc(Ⅱ) coordination polymers,[Zn(HIMB)2]n (1) and {[Zn(IMB)]· 1.5H2O}n (2),(H2IMB=4,4'-((1H-imidazol-1-yl)methylene)dibenzoic acid),have been synthesized and characterized by IR spectroscopy,elemental analyses,thermogravimetric analysis (TGA),powder X-ray diffraction (PXRD),and single-crystal X-ray diffraction.Complex 1 crystallizes in orthorhombic,space group C2221 with a=0.935 2(3) nm,b=2.583 3(8) nm,c=1.396 4(4)nm,V=3.373 6(18) nm3,Mr=707.98,Dc=1.394 g· cm-3,F(000)=1 456,μ=0.786 mm-1 and 2=4.The final R1=0.048 6and wR2=O.120 1 for 2 794 observed reflections when I＞2σ(I).Complex 2 belongs to tetragonal,space group I41/acd with a=1.853 5(2) nm,b=1.853 5(2) nm,c=4.309 7(5) nm,V=14.806 (4) nm3,Mr=412.69,Dc=1.481 g·cm-3,F(000)=6 752,μμ=0.136 0 mm-1 and Z=32.The final R1=0.043 7 and wR2=0.117 1 for 3 615 observed reflections when I＞2σ(I).Structural analyses reveal that complex 1 shows a 2D→2D polycatenane of 2-fold interpenetrated sql layer,whereas complex 2 possesses a 3D 2-fold interpenetrated (3,6)-connected net with the point symbol of (611.84)(63)2.The results show that the solvent plays a significant role in the structure of the final products.CCDC:1851301,1;1851302,2.
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