期刊
ADVANCED MATERIALS
卷 33, 期 15, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202008020
关键词
biogenic amines; food safety; metal– organic frameworks; ratiometric fluorescence; visual detection
类别
资金
- National Natural Science Foundation of China [21875218]
- Zhejiang Provincial Public Technology Research Project [LGF20B010001]
This study introduces a smart evaluation system based on fluorescent metal-organic frameworks for real-time monitoring of food freshness, which can be easily integrated with smartphone platforms for on-site inspection of raw fish samples. The system not only has economic value, but also great significance for public health.
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 Eu3+ 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.
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