Issue 7, 2023

A lanthanide-MOF based host–guest intelligent dual-stimulus response platform for naked-eye and ratiometric fluorescence monitoring of food freshness

Abstract

Developing a simple, rapid, and accurate sensing platform to detect tyramine (Tyr), an indicator of food spoilage, is tremendously significant for food safety and human health. Here, two novel isostructural lanthanide metal–organic frameworks (Ln-MOFs) [Ln(dbia)(COO)]n (Ln-dbia, Ln = Sm, Eu, H2dbia = 5-((4′-(imidazol-1-yl)benzyl)oxy)isophthalic acid) with high chemical stability have been successfully synthesized and employed as a host to setup a ratiometric fluorescent platform. A dual-emission Flu@Eu-dbia probe is constructed by encapsulating the guest luminescent molecule fluorescein (Flu) in Eu-dbia due to the suitable pore structure, strong host–guest interaction and rapid electron transfer, which shows significantly improved fluorescence sensitivity to Tyr (LOD: 66.3 nM) along with a clearly distinguishable color transition from red to green. Furthermore, Flu@Eu-dbia containing portable test strips are fabricated and successfully applied for monitoring the freshness of beef in practical application. More importantly, an intelligent logic gate is designed to record the ratiometric fluorescence change of Flu@Eu-dbia vs. the concentration level of Tyr, which exhibited a great promise in the application of smart devices for food safety.

Graphical abstract: A lanthanide-MOF based host–guest intelligent dual-stimulus response platform for naked-eye and ratiometric fluorescence monitoring of food freshness

Supplementary files

Article information

Article type
Paper
Submitted
23 nov. 2022
Accepted
13 déc. 2022
First published
13 déc. 2022

J. Mater. Chem. C, 2023,11, 2514-2521

A lanthanide-MOF based host–guest intelligent dual-stimulus response platform for naked-eye and ratiometric fluorescence monitoring of food freshness

C. Ji, J. Zhang, R. Fan, Y. Chen, Y. Zhang, T. Sun and Y. Yang, J. Mater. Chem. C, 2023, 11, 2514 DOI: 10.1039/D2TC04972D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements