A rapid on-site fluorescence sensing platform for malachite green in an aqueous phase based on lanthanide-functionalized MOF

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL

Microchimica Acta Pub Date : 2025-03-25 DOI:10.1007/s00604-025-07113-0

Yu Yan, Hao Guo, Zhiguo Yu, Zeyun Yang, Dengke Zhuang, Yanyan Ma, Mingyue Wang, Wu Yang

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引用次数: 0

Abstract

The residue of malachite green (MG) in water has serious toxic effects on the human body, so it is very important to establish a highly sensitive and convenient method for MG detection. In this study, a novel double-emission lanthanide MOF fluorescence probe (Eu-Zn-MOF) was designed for monitoring MG in water by post-synthetic modification (PSM) to Zn-MOF synthesized by a simple hydrothermal method. Eu-Zn-MOF exhibits excellent photoluminescence properties, making it suitable as a ratiometric fluorescence sensor (I₄₁₀/I₆₁₅) for the sensitive detection of MG. MG effectively quenches the luminescence of Eu³⁺ at 615 nm, while the luminescence of the Zn-MOF frame at 410 nm remains unaltered. The fluorescence sensing platform had a relatively wide linear range (0–30 µM), low detection limit (9.8 nM), high sensitivity, and rapid response time (within 1 min). At the same time, the recovery of actual samples was 90.2–107.0%, and the relative standard deviation (RSD) was ≤ 3.82%. Simultaneously, by combining the smartphone color recognition APP with RGB analysis, a portable smartphone auxiliary sensing platform was established to realize the visual detection of MG. This method provides a novel strategy for real-time monitoring of pollutants in the environment.

Graphical Abstract

查看原文本刊更多论文

孔雀石绿（MG）在水中的残留对人体有严重的毒害作用，因此建立一种高灵敏度、简便易行的孔雀石绿检测方法非常重要。本研究通过对简单水热法合成的 Zn-MOF 进行后合成修饰（PSM），设计了一种新型双发射镧系元素 MOF 荧光探针（Eu-Zn-MOF），用于监测水中的孔雀石绿。Eu-Zn-MOF 具有优异的光致发光特性，适合作为比率荧光传感器（I410/I615）来灵敏检测 MG。MG 能有效淬灭 Eu3+ 在 615 纳米波长处的发光，而 Zn-MOF 框架在 410 纳米波长处的发光则保持不变。该荧光传感平台具有较宽的线性范围（0-30 µM）、较低的检测限（9.8 nM）、较高的灵敏度和快速的响应时间（1 分钟内）。同时，实际样品的回收率为 90.2-107.0%，相对标准偏差（RSD）小于 3.82%。同时，通过将智能手机色彩识别 APP 与 RGB 分析相结合，建立了便携式智能手机辅助传感平台，实现了对 MG 的视觉检测。该方法为实时监测环境中的污染物提供了一种新策略。

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来源期刊

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.