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Bifunctional color-tuning luminescent Ln@Zr-MOFs for white LEDs and sensitive, ultrafast detection of nitrobenzene in aqueous media.
- Source :
- Journal of Materials Chemistry C; 2/7/2022, Vol. 10 Issue 5, p1690-1697, 8p
- Publication Year :
- 2022
-
Abstract
- Rapid and quantitative detection of nitrobenzene (NB) in wastewater is of great significance to protect the natural environment and human health. In this work, bifunctional Ln@Zr-MOFs based on UiO-66 were successfully fabricated by partially replacing terephthalic acid (H<subscript>2</subscript>BDC) ligands with m-phthalic acid (m-H<subscript>2</subscript>BDC) ligands and post-synthetic modification (PSM) with Ln<superscript>3+</superscript> (Ln<superscript>3+</superscript> = Eu<superscript>3+</superscript>, Tb<superscript>3+</superscript>). The "antenna effect" of the m-H<subscript>2</subscript>BDC ligands makes Ln@Zr-MOFs exhibit the characteristic emissions of Ln<superscript>3+</superscript>. By adjusting the amount and type of Ln<superscript>3+</superscript>, controllable color-tuning emissions can be easily realized, which endows them with a great application prospect for white LEDs. On the other hand, Eu<subscript>10</subscript>@Zr-MOFs can serve as a turn-off fluorescent switch of NB because the red emission from Eu<superscript>3+</superscript> can be easily quenched by NB through a photoinduced electron transfer (PET) process between NB and its ligands, and as a result, NB is successfully recognized. Particularly, Eu<subscript>10</subscript>@Zr-MOFs as a fluorescent probe have shown many appealing properties, such as high sensitivity (limit of detection is 1.04 μM, limit of quantification is 3.48 μM, and K<subscript>sv</subscript> = 24459.71 M<superscript>−1</superscript>), quick response (less than 60 s), a broad response window (0–180 μM), excellent selectivity, and strong anti-interference ability. The real detection results of NB concentration in natural water samples have demonstrated that the reported Eu<subscript>10</subscript>@Zr-MOFs are a potential fluorescent material that can precisely and sensitively perform fluorescence sensing of NB. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507526
- Volume :
- 10
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry C
- Publication Type :
- Academic Journal
- Accession number :
- 155052325
- Full Text :
- https://doi.org/10.1039/d1tc05243h