Issue 2, 2021

A dual-emitting mixed-lanthanide MOF with high water-stability for ratiometric fluorescence sensing of Fe3+ and ascorbic acid

Abstract

Herein, we design and prepare a dual-emitting lanthanide metal–organic framework (Eu0.07Gd0.03-MOF) based on functionalized ligands, which can be developed as a ratiometric sensor. This self-calibrated material not only displays high water stability but also offers a highly sensitive and color change detection of Fe3+ and ascorbic acid at a low limit of detection. Moreover, water stability surveys for Eu0.07Gd0.03-MOF indicate that it maintains structural stability and displays at least 90.4% and 87.5% fluorescence intensity after storage in water for 28 days in water at 70 °C for 6 days, as well as in acidic-basic solutions of broad pH range (3–11) for four days. More importantly, the low concentration range of Fe3+ and ascorbic acid can be estimated by the ratios of ligand-based emission as an internal reference and Eu3+-based emission as the indicator, thus yielding a visually discernible “color-change-recover” effect.

Graphical abstract: A dual-emitting mixed-lanthanide MOF with high water-stability for ratiometric fluorescence sensing of Fe3+ and ascorbic acid

Supplementary files

Article information

Article type
Paper
Submitted
09 oct. 2020
Accepted
17 nov. 2020
First published
18 nov. 2020

J. Mater. Chem. C, 2021,9, 562-568

A dual-emitting mixed-lanthanide MOF with high water-stability for ratiometric fluorescence sensing of Fe3+ and ascorbic acid

H. Yu, Q. Liu, J. Li, Z. Su, X. Li, X. Wang, J. Sun, C. Zhou and X. Hu, J. Mater. Chem. C, 2021, 9, 562 DOI: 10.1039/D0TC04781C

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