Synthesis, Crystal Structures and Fluorescence Properties of Silver and Lead Coordination Polymers Based on Pyrazole-3-Carboxylic Acid
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摘要: 用水热法合成了吡唑-3-甲酸的两个配合物{[Ag (Py-3-CA)]n(1)和[Pb2(Py-3-CA)4]n(2)}(Py-3-CA=吡唑-3-甲酸),用X射线单晶衍射仪测定了配合物的晶体结构,并对其进行了红外光谱、元素分析、X射线粉末衍射、荧光等性质的表征.结果表明:配合物1属于单斜晶体,P21/c空间群,晶胞参数a=0.859 97(4) nm,b=0.576 70(2) nm,c=1.012 87(4) nm,β=97.673(4)°,V=0.497 83(4) nm3,Z=4;晶体2属于单斜晶体,P21/c空间群,晶胞参数a=1.107 64(3) nm,b=2.366 60(6) nm,c=0.863 20(2) nm,β=110.313(3)°,V=2.122 02(10) nm3,Z=4.配合物中的氢键作用使其自组装成稳定的三维立体结构.荧光测试结果表明,配合物1和2具有荧光性质.Abstract: Two complexes of pyrazole-3-carboxylic acid, {[Ag (Py-3-CA)]n (1) and[Pb2 (Py-3-CA)4]n (2)}(Py-3-CA=pyrazole-3-carboxylic acid), were synthesized by hydrothermal method. The complexes were characterized by IR spectroscopy, elemental, fluorescence, X-ray powder diffraction and single-crystal X-ray diffraction analyses. The results showed that the complex 1 belongs to monoclinic crystal,P21/c space group, unit cell parameter a=0.859 97(4) nm,b=0.576 70(2) nm,c=1.012 87(4) nm,β=97.673(4)°,V=0.49783(4) nm3,Z=4,and the complex 2 belongs to monoclinic crystal,P21/c space group, unit cell parameter a=1.107 64(3) nm,b=2.366 60(6) nm,c=0.863 20(2) nm,β=110.313(3)°,V=2.122 02(10) nm3,Z=4. The complexes were linked to three-dimensional structures by the hydrogen bonds. The results of fluorescence measurements showed that complex 1 and 2 had fluorescent properties.
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Keywords:
- pyrazole-3-carboxylic acid /
- crystal structure /
- fluorescence /
- complex /
- functional material
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