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. 2020 Jun 29;10(42):24764-24771.
doi: 10.1039/d0ra02581j.

A dual emission metal-organic framework for rapid ratiometric fluorescence detection of CO3 2- in seawater

Yu Wei  1 , Yan Xia  1   2   3   4
Affiliations

A dual emission metal-organic framework for rapid ratiometric fluorescence detection of CO3 2- in seawater

Yu Wei et al. RSC Adv. .

Abstract

A dual emission metal-organic framework (IRMOF-10-Eu) was prepared and used as a ratiometric fluorescent sensor for CO3 2- detection. IRMOF-10-Eu had good stability and excellent luminescence in aqueous solution. IRMOF-10-Eu showed dual fluorescence emission from the ligand and Eu3+ with single excitation. Upon treatment with CO3 2-, the fluorescence ratio (I 624/I 358) of the probe displayed significant change. The relative fluorescence intensity ratio (I 624/I 358) and CO3 2- concentration had a linear relationship in 50-300 μM range with a low detection limit of 9.58 μM. And the luminescence probe of CO3 2- showed a fast detection time. The possible mechanism was investigated. CO3 2- changed the structure of IRMOF-10-Eu and interrupted the energy transfer process. Thus, the fluorescence emission intensity of the ligand was increased and Eu3+ was decreased with the addition of CO3 2-. IRMOF-10-Eu was used to detect CO3 2- in seawater, which showed good prospect in practical application. Subsequently, a highly selective and sensitive probe, IRMOF-10-Eu, may pave an efficient way for CO3 2- detection in seawater.

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Conflict of interest statement

The authors have declared no conflict of interest.

Figures

Fig. 1
Fig. 1. (A) PXRD patterns of IRMOF-10 and IRMOF-10-Eu; SEM image of IRMOF-10 (B) and IRMOF-10-Eu (C); (D) TGA curve of IRMOF-10 and IRMOF-10-Eu.
Fig. 2
Fig. 2. The excitation and emission spectrum of IRMOF-10-Eu. Inset shows photograph of the mixture solution illustrate color under daylight (left) and ultraviolet light (right).
Fig. 3
Fig. 3. Day-to-day fluorescence stability of IRMOF-10-Eu (0.05 mg mL−1) under excitation at 278 nm.
Fig. 4
Fig. 4. (A) The emission spectra of IRMOF-10-Eu added in CO32− solution with different concentration under excitation at 278 nm. (B) Plot of the relative luminescence intensity (I624/I358) versus the concentration of CO32−.
Fig. 5
Fig. 5. Luminescence ratio of I624/I358 from the responses of IRMOF-10-Eu in the presence of 300 μM carbonate ions and 500 μM interference ions.
Scheme 1
Scheme 1. A plausible mechanism for detection of CO32− using IRMOF-10-Eu.
See this image and copyright information in PMC

References

    1. Tir N. Al Ezzi M. M. Abdullah H. M. Yusupov M. Kouser S. Bahlouli H. Yamani Z. H. Detection of CO2 using CNT-based sensors: role of Fe catalyst on sensitivity and selectivity. Mater. Chem. Phys. 2017;186:353–364. doi: 10.1016/j.matchemphys.2016.11.006. - DOI
    1. Feely R. A. Alin S. R. Newton J. Sabine C. L. Warner M. Devol A. Krembs C. Maloy C. The combined effects of ocean acidification, mixing, and respiration on pH and carbonate saturation in an urbanized estuary. Estuar. Coast Shelf Sci. 2010;88:441–449. doi: 10.1016/j.ecss.2010.05.004. - DOI
    1. Thimaradka V. Pangannaya S. Mohan M. Trivedi D. R. Hydrazinylpyridine based highly selective optical sensor for aqueous source of carbonate ions: electrochemical and DFT studies. Spectrochim. Acta, Part A. 2018;193:330–337. doi: 10.1016/j.saa.2017.12.041. - DOI - PubMed
    1. He L. Liu C. Xin J. H. A novel turn-on colorimetric and fluorescent sensor for Fe3+ and Al3+ with solvent-dependent binding properties and its sequential response to carbonate. Sens. Actuators, B. 2015;213:181–187. doi: 10.1016/j.snb.2015.02.060. - DOI
    1. Ghorai A. Mondal J. Chandra R. Patra G. K. A reversible fluorescent-colorimetric chemosensor based on a novel Schiff base for visual detection of CO32− in aqueous solution. RSC Adv. 2016;6:72185–72192. doi: 10.1039/C5RA24549D. - DOI