The Construction of Carbazole-Based Metal–Organic Frameworks as Fluorescent Probes for Picric Acid Detection
Nitroaromatic-explosives (NEs) not only threaten global security but are also recognized as a highly toxic pollutant. Metal–organic framework <b>Zn-M<sub>s</sub></b> (<b>Zn-M<sub>1</sub>, Zn-M<sub>2</sub></b>) were synthesized in this study...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-03-01
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| Series: | Chemosensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2227-9040/13/3/105 |
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| Summary: | Nitroaromatic-explosives (NEs) not only threaten global security but are also recognized as a highly toxic pollutant. Metal–organic framework <b>Zn-M<sub>s</sub></b> (<b>Zn-M<sub>1</sub>, Zn-M<sub>2</sub></b>) were synthesized in this study via the coordination-driven self-assembly of Zn ions and a carbazole-based ligand <b>L</b> containing an aldehyde group. They inherited the excellent fluorescence performance of ligand <b>L</b> and could work as a fluorescent sensor for detecting picric acid (PA) at low concentrations. <b>Zn-M<sub>s</sub></b> showed an emission at 450 nm and exhibited a higher fluorescence quenching efficiency toward PA than other related NEs. The results suggest that the fluorescent response might be attributed to the inner filter effect (IFE); Förster resonance energy transfer (FRET); and possibly, photo-induced electron transfer (PET). In addition, the critical role of the aldehyde group as a recognition site was corroborated using a post-modification strategy. |
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| ISSN: | 2227-9040 |