Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao, 266071, China; School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China.
School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China.
Talanta. 2024 Aug 15;276:126253. doi: 10.1016/j.talanta.2024.126253. Epub 2024 May 12.
A novel zeolitic imidazolate framework-encapsulated zinc porphyrin (ZnTCPP@ZIF-90) photoresponsive nanozyme is proposed for the colorimetric/fluorescent dual-mode visual sensing of glyphosate (Gly). ZnTCPP@ZIF-90 exhibits photoresponsive oxidase-like activity and fluorescence quenching behavior. Meanwhile, the outer ZIF-90 layer can be selectively destroyed by Gly, causing the release of free ZnTCPP, resulting in the enhanced enzyme-like activity as well as fluorescence emission. The constructed ZnTCPP@ZIF-90 was successfully used for the colorimetric/fluorescent dual-mode detection of Gly. Additionally, the colorimetric and fluorescent images information captured by the smartphone were converted to color intensity (HSV/RGB values), with limits of detection of 0.27 μg/mL and 0.19 μg/mL, respectively. The proposed dual-mode sensor exhibits excellent selectivity and reliability for detecting Gly, and can be successfully applied to the analysis of real samples such as tap water, lake water, and fruit washing water. The current research efforts are expected to provide new perspectives for designing highly active photoresponsive nanozymes and their stimuli-responsive sensing systems, paving the way for their applications in portable dual-mode chemical sensing and environmental monitoring.
一种新型沸石咪唑骨架包裹锌卟啉（ZnTCPP@ZIF-90）光响应纳米酶被提出用于草甘膦（Gly）的比色/荧光双模可视化传感。ZnTCPP@ZIF-90 表现出光响应的过氧化物酶样活性和荧光猝灭行为。同时，外部 ZIF-90 层可以被 Gly 选择性地破坏，导致游离 ZnTCPP 的释放，从而增强酶样活性和荧光发射。构建的 ZnTCPP@ZIF-90 成功用于 Gly 的比色/荧光双模检测。此外，智能手机捕获的比色和荧光图像信息被转换为颜色强度（HSV/RGB 值），检测限分别为 0.27μg/mL 和 0.19μg/mL。所提出的双模传感器对 Gly 的检测表现出优异的选择性和可靠性，并且可以成功应用于实际样品的分析，如自来水、湖水和水果洗涤水。目前的研究工作有望为设计高活性光响应纳米酶及其刺激响应传感系统提供新的视角，为其在便携式双模化学传感和环境监测中的应用铺平道路。
