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Evaluation of electrogenerated chemiluminescence from a neutral Ir(III) complex for quantitative analysis in flowing streams
- Evaluation of electrogenerated chemiluminescence from a neutral Ir(III) complex for quantitative analysis in flowing streams
- Shin, I.-S.[Shin, Ik Soo]; Kang, Y.-T.[Kang, Yeung T.]; Lee, J.-K.[Lee, Jin Kyu]; Kim, H.[Kim, Ha Suck]; Kim, T.H.[Kim, Tae Hyun]; Kim, J.S.[Kim, Jong Seung]
- DGIST Authors
- Kim, H.[Kim, Ha Suck]
- Issue Date
- Analyst, 136(10), 2151-2155
- Article Type
- Acetyl Acetonate; Alkanone; Chemiluminescent Measurements; Chemistry; Chemoluminescence; Coordination Complexes; Coordination Compound; Electrochemical Analysis; Electrochemical Techniques; Flow Injection Analysis; Hydrogen-Ion Concentration; Hydroxybutyrates; Hydroxybutyric Acid; Iridium; Methodology; Pentanones; pH; Propylamine; Propylamines; Synthesis
- Though recently Ir(III) complexes have attracted much interest in electrochemiluminescent (ECL) analysis due to their high emission in various wavelengths, there were a few studies reported on its analytical applications. In this study, we evaluate the ECL from (pq)2Ir(acac) (pq = 2-phenylquinolate, acac = acetylacetonate) for the use in flow injection analysis. An aqueous solution of the analyte and (pq)2Ir(acac) passes through the reaction/observation cell, and then ECL reaction is generated by electrochemical initiation on the analyte and (pq)2Ir(acac). Tri-n-propylamine (TPrA) is used as a representative analyte for evaluation. Additionally, a comparison is made of the relative ECL intensities obtained for a variety of analytes including oxalate, amino acids, aliphatic amines, and NADH. The (pq)2Ir(acac) produces efficient ECL upon TPrA exhibiting the limit of detection of 5 nM with a linear range of 3 orders of magnitude in concentration whereas 20 nM is observed in the conventional Ru(bpy) 3 2+ system. It shows particular sensitivity advantages for oxalate, proline, and tartaric acid. The ECL generation upon various analytes proposes direct applicability of (pq)2Ir(acac) as a post-column detection tool. © 2011 The Royal Society of Chemistry.
- Royal Society of Chemistry
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