An oxalate-bridged pyridylphosphonate-Eu coordination polymer as a dual-probe for highly sensitive detection of Fe3+ and trans, trans-muconic acid

IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2025-09-14 DOI:10.1016/j.poly.2025.117779

Yi-Ling Liu, Pin-Yi Li, Rui Zhang, Ping Zou, Guang-Tu Wang

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Abstract

Although pyridine phosphonic acid coordination polymers exhibit structural diversity and notable properties, their crystallinity is often compromised by weak pyridine nitrogen coordination. This study addresses this limitation by leveraging oxalic acid's strong metal-bridging capability to construct the highly crystalline {[Eu₂(3-pmp)(H₂O)₂(C₂O₄)₃]·4H₂O}ₙ, comprehensively characterized by XRD, TGA, PXRD, PL, TEM, EDS, and BET analyses. The resultant Eu coordination polymer demonstrates intense characteristic red emission and functions as a dual-probe for highly sensitive detection of Fe³⁺ (LOD = 1.41 × 10⁻⁵ mol/L) and trans,trans-muconic acid (LOD = 7 × 10⁻⁵ mol/L). It exhibits stability under rigorous conditions: aqueous environments, broad pH range (2−10), thermal stress (≤260 °C), and maintains functionality over >4 cycles in environmental water and urine samples. Mechanistic studies reveal synergistic fluorescence quenching via competitive ultraviolet absorption and photoinduced electron transfer (PET).

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草酸桥接吡啶膦酸铕配位聚合物作为高灵敏度检测Fe3+和反式、反式黏液酸的双探针

虽然吡啶膦酸配位聚合物具有结构多样性和显著的性能，但其结晶度往往受到弱吡啶氮配位的影响。该研究利用草酸的强金属桥接能力构建了高结晶的{[Eu₂（3-pmp）（H₂O）₂（C₂O₄）₃]·4H₂O}，并通过XRD、TGA、PXRD、PL、TEM、EDS和BET分析进行了全面表征。所制得的Eu配位聚合物具有强烈的特征红光发射，可作为高灵敏度检测Fe3+ （LOD = 1.41 × 10−5 mol/L）和反式、反式mucic酸（LOD = 7 × 10−5 mol/L）的双探针。它在严格的条件下表现出稳定性：水环境，宽pH范围（2 - 10），热应力（≤260°C），并在环境水和尿液样品中保持超过4个循环的功能。机理研究揭示了通过竞争紫外吸收和光诱导电子转移（PET）协同荧光猝灭。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.