A Fluorescent Metal–Organic Framework for Food Real‐Time Visual Monitoring. Issue 15 (10th March 2021)

• Record Type: Journal Article
• Authors: Wang, Jing; Li, Daquan; Ye, Yingxiang; Qiu, Yu; Liu, Jiawei; Huang, Liang; Liang, Bin; Chen, Banglin
• Is Part Of: Advanced materials. Volume 33:Issue 15(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-03-10
• Subjects: biogenic amines -- food safety -- metal–organic frameworks -- ratiometric fluorescence -- visual detection; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202008020
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: Due to increasing food‐safety issues, exploiting efficient approaches for food quality assessment and instrumentation has attracted concerns worldwide. Herein, a smart evaluation system based on a fluorescent metal–organic framework (MOF) is developed for real‐time visual monitoring of food freshness. Via post‐synthetic modification, a ratiometric fluorescent MOF probe is constructed by covalently coupling fluorescein 5‐isothiocyanate (5‐FITC) with NH2 ‐rich lanthanide MOF. The probes exhibit a dual‐emissive‐responsive to biogenic amine, resulting in an increase in FITC emission along with a decrease in Eu 3+ emission accompanied by a clear distinguishable color transition from orange red to green. After doping the probes on a flexible substrate, the obtained MOF composite film can be integrated with a smartphone‐based portable platform easily. It is proved that this smart evaluation system can be used for on‐site inspection of the freshness of raw fish samples. This work develops a fluorescent MOF‐based smart evaluation system as a novel platform for application in food monitoring, which not only has enormous economic value but also holds great public health significance. Abstract : A smart color‐variation evaluation system based on a fluorescent metal–organic framework probe and smartphone‐based portable device is designed for on‐site inspection of food quality. The freshness of raw fish samples can be accurately and monitored in real time by the naked eye by the clearly distinguishable color transition from orange red to green.