A Phenyl-Modified Aggregation-Induced Phosphorescent Emission-Active Cationic Ru(II) Complex for Detecting Picric Acid in Aqueous Media
A cationic Ru(II) complex <b>Ru1</b> with 5-phenyl-2,2′-bipyridine as ligand was synthesized and fully characterized. <b>Ru1</b> exhibits significant aggregation-induced phosphorescent emission (AIPE) activity in THF/H<sub>2</sub>O. The AIPE property of <b>R...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
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| Series: | Chemosensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2227-9040/13/1/14 |
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| Summary: | A cationic Ru(II) complex <b>Ru1</b> with 5-phenyl-2,2′-bipyridine as ligand was synthesized and fully characterized. <b>Ru1</b> exhibits significant aggregation-induced phosphorescent emission (AIPE) activity in THF/H<sub>2</sub>O. The AIPE property of <b>Ru1</b> has been successfully used to detect picric acid (PA) in aqueous media. <b>Ru1</b> exhibits a sensitive luminescence quenching response to PA, with a high quenching constant (<i>K</i><sub>SV</sub> = 2.5 × 10<sup>4</sup> M<sup>−1</sup>) and a low limit of detection (LOD = 91 nM). In addition, <b>Ru1</b> demonstrates high sensitivity and selectivity for detecting PA in different common water samples. The UV-vis absorption spectra and luminescence lifetime of <b>Ru1</b> show an obvious change after the addition of PA into the <b>Ru1</b> samples, indicating that the quenching process is a combination of dynamic and static quenching. The density functional theory calculations indicate that the mechanism for the detection of PA is photo-induced electron transfer. |
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| ISSN: | 2227-9040 |