WANG Ting-ting,REN Mei-juan,WU Fang-hui,et al.Synthesis and Application of a Novel “Switch-on” Cyclometalated Iridium Complex Fluorescent Probe for Hypochlorite Detection[J].Journal of Instrumental Analysis,2022,41(08):1170-1177.
WANG Ting-ting,REN Mei-juan,WU Fang-hui,et al.Synthesis and Application of a Novel “Switch-on” Cyclometalated Iridium Complex Fluorescent Probe for Hypochlorite Detection[J].Journal of Instrumental Analysis,2022,41(08):1170-1177. DOI: 10.19969/j.fxcsxb.22022603.
Synthesis and Application of a Novel “Switch-on” Cyclometalated Iridium Complex Fluorescent Probe for Hypochlorite Detection
In this paper,a novel sensitive fluorescent probe[Ir(bzq),2,(L1)](PF,6,)(bzq,i.e. benzoquinoline,and L1,i.e. 4'-methyl-2,2'-bipyridine-4-formaldehyde oxime) was synthesized and characterized in detail.After adding hypochlorite(ClO,-,) in [Ir(bzq),2,(L1)](PF,6,) system,the fluorescence of this complex was significantly enhanced because the oxime group on L1 as the reaction site was transformed into the carboxylic acid,resulting in a bright visible orange-yellow light from dark brown under a 365 nm ultraviolet lamp.Under the optimum conditions,the fluorescence intensity of [Ir(bzq),2,(L1)](PF,6,) probe showed a good linear relationship with hypochlorite in the concentration range of 0.1-210 µmol/L,with a detection limit of 3.08 nmol/L.The selective and competitive experiments revealed that this probe showed better selectivity and sensitivity for ClO,-, than that for other ions.The proposed method was applied to the detection of ClO,-, in local river samples with satisfactory recoveries of 92.4%-103%,suggesting that the fluorescent probe could be used for analysis of ClO,-, in practical samples.
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