Two new coordination polymers with formulae [Zn(HL)(bb)]_n (1) and [Cd(HL)(bb)]_n (2) (H₃L = 1,3,5-tris(3-carbonylphenyloxy)benzene and bb = 4,4′-bis(imidazolyl)biphenyl) have been synthesized solvothermally and structurally characterized by by elemental analysis, IR, single crystal X-ray diffraction and thermal analyses. X-ray single diffraction studies reveal that compounds 1 and 2 show similar tree-fold interpenetrating 4-connected 2D framework structure with the sql topological net and the Schläfli symbol of {4⁴·6²} and are further extended into 3D supramolecular network by inter-molecular hydrogen bonding. Compound 1 have been used as turn-off luminescent sensor and displayed sensitive and selective luminescence sensing for nitrofurazone antibiotic (NFZ) with K_sv of 0.87×10³ M⁻¹ and 1.98 ppm limit of detection (LOD). The plausible mechanistic pathway for the detrioration in the luminescent intensity of 1 in presence of antibiotics have been explained with the help of theoretical calculations. The calculations indicated that the decline in fluorescence intensity of 1 was accredited to the electron/energy transfer as well as weak interactions operating between 1 and antibiotic.

两种新型配位聚合物，结构式为 [Zn(HL)(bb)] _n ( 1 ) 和 [Cd(HL)(bb)] _n ( 2 ) (H ₃ L = 1,3,5-tris(3-carbonylphenoxy))苯和bb = 4,4'-双(咪唑基)联苯)已通过溶剂热合成，并通过元素分析、红外、单晶X射线衍射和热分析进行了结构表征。X射线单衍射研究表明，化合物1和2表现出类似的树形折叠互穿4连接2D框架结构，具有sql^{拓扑网络和{4 4} ·6 ² }的Schläfli符号，并进一步扩展到3D超分子网络分子间氢键。化合物1已被用作关断发光传感器，对呋喃西林抗生素(NFZ)表现出灵敏和选择性的发光传感，K _sv为0.87×10 ³ M ^-1，检测限(LOD)为1.98 ppm。在理论计算的帮助下，已经解释了在抗生素存在下发光强度1降低的合理机制。计算表明， 1的荧光强度下降归因于电子/能量转移以及1和抗生素之间的弱相互作用。