An ultra-sensitive probe based on Zn-MOF for detection of vanillin and Cr(VI)

IF 2.7 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Inorganica Chimica Acta Pub Date : 2025-04-08 DOI:10.1016/j.ica.2025.122697

Jingze Wang, Bo Jing, Xinke Xu, Wenjun Li, Zhidong Chang, Changyan Sun

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引用次数: 0

Abstract

Vanillin is widely used in food production, but excessive consumption can cause health problems, so the detection of vanillin is of great significance for food safety. In this paper, a fluorescent sensor (Zn-MOF) for the effective recognition of vanillin was developed. The fluorescence of Zn-MOF was quenched by vanillin and the detection mechanism could be attributed to competitive absorption and photoelectron-induced transfer. The detection limit was calculated 1.44 × 10⁻⁹ M, which is the lowest among MOF fluorescent probes for vanillin. Notably, filter paper strips based on Zn-MOF could be used for visual detection of vanillin and the Zn-MOF sensor could be applied for quantitative analysis of vanillin in food samples. Moreover, the multifunctional probe's ability to detect Cr₂O₇²⁻/CrO₄²⁻ with detection limits of 8.22 × 10⁻⁹ / 7.73 × 10⁻⁹ M underscores its versatile analytical potential. The practical application of Zn-MOF in biscuits and river water has yielded recoveries ranging from 98.33 % to 100.7 %, with outstanding reproducibility (RSD = 0.47 % ~ 3.30 %).

Abstract Image

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Zn-MOF超灵敏探针检测香兰素和Cr（VI）

香兰素在食品生产中应用广泛，但过量食用会造成健康问题，因此对香兰素的检测对食品安全具有重要意义。本文研制了一种有效识别香兰素的荧光传感器（Zn-MOF）。Zn-MOF的荧光被香兰素猝灭，其检测机制可归因于竞争吸收和光电子诱导转移。检测限为1.44 × 10−9 M，是MOF荧光探针中检测香兰素最低的。值得注意的是，基于Zn-MOF的滤纸条可用于视觉检测香兰素，Zn-MOF传感器可用于食品样品中香兰素的定量分析。此外，多功能探针检测Cr2O72−/CrO42−的能力，检测限为8.22 × 10−9 / 7.73 × 10−9 M，强调了其多功能分析潜力。锌- mof在饼干和河水中的实际应用回收率为98.33 % ~ 100.7 %，重现性好（RSD = 0.47 % ~ 3.30 %）。

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来源期刊

Inorganica Chimica Acta 化学-无机化学与核化学

CiteScore

6.00

自引率

3.60%

发文量

440

审稿时长

35 days

期刊介绍： Inorganica Chimica Acta is an established international forum for all aspects of advanced Inorganic Chemistry. Original papers of high scientific level and interest are published in the form of Articles and Reviews. Topics covered include: • chemistry of the main group elements and the d- and f-block metals, including the synthesis, characterization and reactivity of coordination, organometallic, biomimetic, supramolecular coordination compounds, including associated computational studies; • synthesis, physico-chemical properties, applications of molecule-based nano-scaled clusters and nanomaterials designed using the principles of coordination chemistry, as well as coordination polymers (CPs), metal-organic frameworks (MOFs), metal-organic polyhedra (MPOs); • reaction mechanisms and physico-chemical investigations computational studies of metalloenzymes and their models; • applications of inorganic compounds, metallodrugs and molecule-based materials. Papers composed primarily of structural reports will typically not be considered for publication.