Issue 17, 2023

Periodic mesoporous organosilica based sensor for broad range mercury detection by simultaneous downshifting/upconversion luminescence

Abstract

Recent research in lanthanide materials has strongly contributed to the development of high-performance chemical sensors. However, the current reported high-responsive chemical sensors still have a limited detection range, restraining their further application. We developed lanthanide-based periodic mesoporous organosilica (LnPMO) hollow spheres with interior lanthanide-doped fluorides for luminescence turn-off sensing of Hg2+ with a low detection limit and wide detection range. This yolk–shell structure was built of Tb3+ grafted diureido-benzoicacid PMO (shell) and lanthanide-doped fluoride NaYF4:Yb,Er (yolk), exhibiting both downshifting (DS) and upconversion (UC) luminescence. Visible photoluminescence properties of the developed hybrid material were studied using UV and near-infrared (NIR) excitation. In DS mode, benzoic acid-functionalized PMO acts as an organic co-sensitizer for Tb3+ β-diketonate complexes, which can significantly enhance the ion sensing and detection range. In UC mode, Hg2+-responsive rhodamine B thiolactone (RBT) was used as an antenna species for the lanthanide-doped fluorides to sense Hg2+ with high sensitivity.

Graphical abstract: Periodic mesoporous organosilica based sensor for broad range mercury detection by simultaneous downshifting/upconversion luminescence

Supplementary files

Article information

Article type
Paper
Submitted
06 Feb 2023
Accepted
29 Mar 2023
First published
31 Mar 2023

J. Mater. Chem. C, 2023,11, 5634-5645

Periodic mesoporous organosilica based sensor for broad range mercury detection by simultaneous downshifting/upconversion luminescence

C. Liu, A. M. Kaczmarek, H. S. Jena, Z. Yang, D. Poelman and P. Van Der Voort, J. Mater. Chem. C, 2023, 11, 5634 DOI: 10.1039/D3TC00435J

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