Sensitive Detection and Visual Recognition of Emodin Based on a Zn Coordination Polymer Probe

IF 3.7 2区化学 Q2 CHEMISTRY, APPLIED

Applied Organometallic Chemistry Pub Date : 2025-08-21 DOI:10.1002/aoc.70377

Ruijie Xu, Yefang Yang, Shaowen Qie, Wenping Hu, Wenting Li, Ming Hu

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Abstract

Based on 2,4,6-pyridinetricarboxylic acid (H₃ptba) and o-phenanthroline (phen), a zinc-based fluorescence coordination polymer was successfully synthesized, namely, [Zn₃(ptba)₂(phen)₂(H₂O)₄]_n (1). The single-crystal diffraction analysis shows that Zn²⁺ ions in complex 1 are alternately connected with ptba³⁻ and phen ligands to form a one-dimensional chain structure, which further constitutes a three-dimensional supramolecular architecture through the π···π interactions. Complex 1 demonstrated excellent stability of thermogravimetry and displayed good fluorescence intensity in aqueous solution with a wide pH range. In this work, complex 1 was used as a fluorescence sensor for the detection of the emodin (Emo) molecule. It was found that complex 1 had high sensitivity with the detection limit of 1.0 × 10⁻⁷ M and simultaneously displayed specific selectivity for the exploration of the Emo molecule. The dynamic quenching, the absorption competition, and the photo-induced electron transfer process are responsible for the recognition mechanism of complex 1 with sensing Emo. It is worth mentioning that a fluorescent film based on complex 1 was successfully fabricated, which could rapidly recognize the Emo molecule with the naked eye further.

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基于锌配位聚合物探针的大黄素的灵敏检测与视觉识别

以2,4,6-吡啶三羧酸（H3ptba）和邻菲罗啉（phen）为基料，成功合成了一种锌基荧光配位聚合物[Zn3(ptba)2(phen)2(H2O)4]n(1)。单晶衍射分析表明，配合物1中的Zn2+离子与ptba3−和phen配体交替连接，形成一维链结构，通过π···π相互作用进一步构成三维超分子结构。配合物1具有良好的热重稳定性，在较宽pH范围的水溶液中表现出良好的荧光强度。在这项工作中，配合物1作为荧光传感器检测大黄素（Emo）分子。结果表明，配合物1具有较高的灵敏度，检出限为1.0 × 10−7 M，同时对Emo分子的探测具有特异性选择性。动态猝灭、吸收竞争和光诱导电子转移过程是配合物1与感应Emo的识别机制。值得一提的是，成功制备了一种基于配合物1的荧光膜，可以进一步用肉眼快速识别Emo分子。

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来源期刊

Applied Organometallic Chemistry 化学-无机化学与核化学

CiteScore

7.80

自引率

10.30%

发文量

408

审稿时长

2.2 months

期刊介绍： All new compounds should be satisfactorily identified and proof of their structure given according to generally accepted standards. Structural reports, such as papers exclusively dealing with synthesis and characterization, analytical techniques, or X-ray diffraction studies of metal-organic or organometallic compounds will not be considered. The editors reserve the right to refuse without peer review any manuscript that does not comply with the aims and scope of the journal. Applied Organometallic Chemistry publishes Full Papers, Reviews, Mini Reviews and Communications of scientific research in all areas of organometallic and metal-organic chemistry involving main group metals, transition metals, lanthanides and actinides. All contributions should contain an explicit application of novel compounds, for instance in materials science, nano science, catalysis, chemical vapour deposition, metal-mediated organic synthesis, polymers, bio-organometallics, metallo-therapy, metallo-diagnostics and medicine. Reviews of books covering aspects of the fields of focus are also published.