As the most attractive and fastest growing fluorescent sensing materials, metal-organic compounds have demonstrated great potential for the detection of various types of chemicals. Two fluorescent phosphonate complexes [Cu₃O₂(HL)₂ ⋅ 2H₂O] (1) and [Cu(H₂L)₂ ⋅ 3H₂O] (2) with diverse structures were designed and synthesized for this purpose from ((2’-cyano-[1,1’-biphenyl]-4-yl)methyl)phosphonic acid (H₂L) and copper ions with various valence state under solvothermal conditions. The structures of 1 and 2 are determined by single X-ray crystal diffraction, and further characterized by elemental analysis, IR, TGA and PXRD. The two complexes demonstrate diverse properties on sensing Fe³⁺ ions, ketone and some antibiotics, and the according detection limits are obtained, indicating which could be applied as a fast, recyclable, and multi-responsive fluorescence sensor. The sensing activity diversity between 1 and 2 toward different analytes was also discussed based on the possible sensing mechanisms to further explore the possible factors affecting the sensibility of the materials.

中文翻译：

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用于检测水中抗生素、酮和 Fe3+ 的两种荧光膦酸铜配合物

作为最具吸引力和发展最快的荧光传感材料，金属有机化合物在检测各种类型的化学物质方面表现出了巨大的潜力。为此，我们设计并合成了两种具有不同结构的荧光膦酸酯复合物 [Cu ₃ O ₂ (HL) ₂  ⋅ 2H ₂ O] (1)和 [Cu(H ₂ L) ₂  ⋅ 3H ₂ O] (2) ( (2'-氰基-[1,1'-联苯]-4-基)甲基)膦酸(H ₂ L)和在溶剂热条件下具有不同价态的铜离子。1和2的结构由单晶 X 射线衍射测定，并通过元素分析、IR、TGA 和 PXRD 进一步表征。这两种配合物在感测Fe ³⁺离子、酮和一些抗生素方面表现出不同的特性，并获得了相应的检测限，表明它们可以用作快速、可回收和多响应的荧光传感器。还基于可能的传感机制讨论了1和2对不同分析物的传感活性多样性，以进一步探索影响材料敏感性的可能因素。