Issue 18, 2023

Ratiometric detection of I using a dysprosium-based metal–organic framework with a single emission center

Abstract

In this study, a dysprosium-based metal–organic framework (MOF) sensor (Dy-MOF) was developed for the ratiometric detection of I in aqueous medium. Upon excitation at 230 nm, Dy-MOF shows two dominant emission bands at 464 nm and 574 nm assigned to (4F, 4D)5/26H9/2 + 6F11/2 and 4F9/26H13/2 transition of Dy3+, respectively, which have different sensitivities toward iodide ions. The introduction of I slightly weakened the blue emission at 464 nm and significantly quenched the yellow emission at 574 nm. Thus, ratiometric sensing for iodide was realized using the yellow-to-blue intensity ratio of Dy3+. Dy-MOF exhibits superior sensing behavior towards I with high selectivity, sensitivity and low detection limit (24 nM). This study also provides a strategy for the construction of a ratiometric sensor with dual-emission bands originating from only one emission center.

Graphical abstract: Ratiometric detection of I− using a dysprosium-based metal–organic framework with a single emission center

Supplementary files

Article information

Article type
Paper
Submitted
21 Feb 2023
Accepted
03 Apr 2023
First published
04 Apr 2023

Dalton Trans., 2023,52, 6061-6066

Ratiometric detection of I using a dysprosium-based metal–organic framework with a single emission center

Q. Guo, F. Yi, M. Zhang, J. Guo and F. Luo, Dalton Trans., 2023, 52, 6061 DOI: 10.1039/D3DT00543G

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