基于一维锌(Ⅱ)配位聚合物的水中2,4,6-三硝基苯酚和氟啶胺的选择性检测

Selective detection of 2,4,6-trinitrophenol and fluazinam in water based on a 1D Zn(Ⅱ)coordination polymer

以1,1’∶4’,1’’∶4’’,1’’’-四联苯-2,4,2’’’,4’’’-四羧酸(H_(4)L)和4,4’-联吡啶(4,4’-bpy)为配体,采用水热法合成了一维锌配位聚合物[Zn_(2)(H_(2)L)_(2)(4,4’-bpy)2(H_(2)O)]n(1),并通过单晶X射线衍射分析、元素分析、红外光谱分析和热重分析等方法对其结构进行了表征。单晶结构分析表明1属于三斜晶系,空间群为P1。配合物1含有2种配位构型不同的锌离子,分别处于扭曲的三角双锥{ZnNO_(4)}和八面体{ZnNO_(5)}几何构型中。配合物中2个H_(2)L^(2-)配体之间通过锌离子相互连接,构成了无限的一维zigzag平面结构。荧光传感实验表明配合物1的荧光能够被2,4,6-三硝基苯酚和氟啶胺猝灭,且具有较高的灵敏度和选择性,抗干扰性也非常好。

A 1D coordination polymer[Zn_(2)(H_(2)L)_(2)(4,4’-bpy)2(H_(2)O)]n(1)(H_(4)L=1,1’∶4’,1’’∶4’’,1’’’-quterphenyl-2,4,2’’’,4’’’-tetracarboxylic acid,4,4’-bpy=4,4’-bipyridine)was synthesized by hydrothermal method,and its structure was characterized by single-crystal X-ray diffraction analysis,elemental analysis,infrared spectroscopy,thermogravimetric analysis,etc.The crystallographic analysis shows that complex 1 belongs to the triclinic crystal system with the space group of P1.Complex 1 consists of two zinc ions with different coordination geometries,which lie in a distorted trigonal bipyramidal{ZnNO_(4)}and octahedral{ZnNO_(5)}geometrical configuration,respectively.The two H_(2)L^(2-)ligands in complex 1 are linked to each other by zinc ions,forming an infinite 1D zigzag planar structure.The fluorescence sensing experiments indicated that the fluorescence of complex 1 could be quenched by 2,4,6-trinitrophenol and fluazinam with high sensitivity and selectivity.Moreover,the anti-interference of detection was also quite excellent.CCDC:2107201.