Two new Zn(II)/Cd(II) coordination polymers, namely, {[Zn₂(L)(CAS)]·H₂O}_n (1) and {[Cd₂(L)(CAS)]·DMF·H₂O}_n (2) [H₄L = 5-(3,5-dicarboxybenzyloxy)isophthalic acid, CAS = 1,2,4,5-tetra(4-pyridyl)benzene] were synthesized by solvothermal method and characterized by single-crystal X-ray diffraction, elemental analysis, thermogravimetric analysis and powder X-ray diffraction. In complex 1, CAS and Zn(II) are interconnected to form a 2D diamond structure. The 2D layers are interlinked by L⁴⁻ ligands to generate a 3D network structure. The L⁴⁻ ligands, CAS and Cd(II) in complex 2 are cross-linked to form a 2D planar structure. The 3D structure is formed by coordination bonds between the two layers. Complexes 1 and 2 could detect p-nitrophenol (4-NP) by fluorescence quenching, and the detection limits were 0.344 and 0.554 μM, respectively. Complex 1 can also be used for sensitive and selective detection of fluazinam (FLU) by fluorescence quenching with the detection limit of 0.185 μM. Additionally, the fluorescence quenching mechanism was also investigated. These new Zn(II)/Cd(II) coordination polymers could be used as dual-functional sensors on NACs and pesticides.

两种新型Zn(II)/Cd(II)配位聚合物，即{[Z n ₂ (L)(CAS)]·H ₂ O} _n ( 1 )和{[C d ₂ (L)(CAS)]溶剂热法合成·DMF·H ₂ O} _n ( 2 ) [H ₄ L = 5-(3,5-二羧基苄氧基)间苯二甲酸, CAS = 1,2,4,5-四(4-吡啶基)苯]方法并通过单晶X射线衍射、元素分析、热重分析和粉末X射线衍射进行表征。在配合物1中，CAS和Zn(II)互连形成2D金刚石结构。2D 层通过 L ⁴⁻配体互连以生成 3D 网络结构。配合物2中的L ⁴⁻配体、CAS和Cd(II)交联形成2D平面结构。3D结构是由两层之间的配位键形成的。配合物1和2能够通过荧光猝灭检测对硝基苯酚(4-NP)，检测限分别为0.344和0.554 μM。复合物1还可用于通过荧光猝灭对氟啶胺 (FLU) 进行灵敏、选择性检测，检测限为 0.185 μM。此外，还研究了荧光猝灭机制。这些新型 Zn(II)/Cd(II) 配位聚合物可用作 NAC 和农药的双功能传感器。