Yu, Raymond and Nguyen, Tiffany and Cortez, Victor H. and Chen, Boyang and Ishihara, Kristi M. and Tapavicza, Enrico and Tian, Fangyuan (2025) Fluorescent Metal-Organic Framework Nanoparticles for Explosive Detection. JOURNAL OF PHYSICAL CHEMISTRY C, 129 (24). pp. 10866-10878. ISSN 1932-7447, 1932-7455
Full text not available from this repository. (Request a copy)Abstract
Fluorescent metal-organic framework (MOF) nanoparticles were prepared by doping zeolitic imidazolate framework-8 (ZIF-8) with fluorescein through '' one-pot '' synthesis. The resulting fluorescein@ZIF-8 (F@ZIF-8) material exhibits a luminescent "turn-off" response toward nitroaromatic explosives. We performed a combined experimental and computational study to understand the structural properties and formation mechanisms of the prepared F@ZIF-8 composite and to explain the solid-state fluorescence and quenching in the presence of a nitroaromatic analyte. We confirmed that fluorescein can be encapsulated within the ZIF-8 cages through electrostatic interactions between dianionic fluorescein and Zn open metal sites. The scaffold of ZIF-8 can reduce the aggregation-caused quenching (ACQ) effect of fluorescein and increase the quantum yield to 69.7 +/- 0.1%. The photophysical mechanism explains the fluorescence emission of F@ZIF-8 in the solid state and the fluorescence quenching in the presence of nitroaromatic analytes, including 2,4,6-trinitrophenol (TNP), trinitrotoluene (TNT), 4-nitrotoluene, nitrobenzene, and 2-nitropropane. Our material exhibits a high sensitivity toward TNP with a limit of detection (LOD) of 2 mu M. This work presents a new opportunity for designing luminescent porous materials for "signal-off" sensing and demonstrates the potential of using luminescent MOFs as an analytical tool for explosive detections.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NITRO EXPLOSIVES; SOLID-STATE; THIN-FILMS; BASIS-SETS; PERFORMANCE; 2,4,6-TRINITROPHENOL; RECOGNITION; DIFFUSION; POLYMERS; STORAGE; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Sep 2026 06:58 |
| Last Modified: | 23 Sep 2026 06:58 |
| URI: | https://pred.uni-regensburg.de/id/eprint/66600 |
Actions (login required)
 |
View Item |
