A Phenyl-Modified Aggregation-Induced Phosphorescent Emission-Active Cationic Ru(II) Complex for Detecting Picric Acid in Aqueous Media

Ruimin Chen; Qinglong Zhang; Liyan Zhang; Chun Liu

doi:10.3390/chemosensors13010014

Chemosensors (Jan 2025)

A Phenyl-Modified Aggregation-Induced Phosphorescent Emission-Active Cationic Ru(II) Complex for Detecting Picric Acid in Aqueous Media

Ruimin Chen,
Qinglong Zhang,
Liyan Zhang,
Chun Liu

Affiliations

Ruimin Chen: State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
Qinglong Zhang: State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
Liyan Zhang: State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
Chun Liu: State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China

DOI: https://doi.org/10.3390/chemosensors13010014
Journal volume & issue: Vol. 13, no. 1
p. 14

Abstract

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A cationic Ru(II) complex Ru1 with 5-phenyl-2,2′-bipyridine as ligand was synthesized and fully characterized. Ru1 exhibits significant aggregation-induced phosphorescent emission (AIPE) activity in THF/H2O. The AIPE property of Ru1 has been successfully used to detect picric acid (PA) in aqueous media. Ru1 exhibits a sensitive luminescence quenching response to PA, with a high quenching constant (KSV = 2.5 × 104 M−1) and a low limit of detection (LOD = 91 nM). In addition, Ru1 demonstrates high sensitivity and selectivity for detecting PA in different common water samples. The UV-vis absorption spectra and luminescence lifetime of Ru1 show an obvious change after the addition of PA into the Ru1 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.

Published in Chemosensors

ISSN: 2227-9040 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry: Biochemistry
Website: http://www.mdpi.com/journal/chemosensors

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