Evaluation of electrogenerated chemiluminescence from a neutral Ir(III) complex for quantitative analysis in flowing streams
- Authors
- Shin, Ik-Soo; Kang, Yeung-Tae; Lee, Jin-Kyu; Kim, Hasuck; Kim, Tae Hyun; Kim, Jong Seung
- Issue Date
- 2011
- Publisher
- Royal Society of Chemistry
- Citation
- Analyst, v.136, no.10, pp 2151 - 2155
- Pages
- 5
- Journal Title
- Analyst
- Volume
- 136
- Number
- 10
- Start Page
- 2151
- End Page
- 2155
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/17385
- DOI
- 10.1039/c1an15045f
- ISSN
- 0003-2654
1364-5528
- Abstract
- 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)(2)Ir(acac) ( pq = 2-phenylquinolate, acac = acetylacetonate) for the use in flow injection analysis. An aqueous solution of the analyte and (pq)(2)Ir(acac) passes through the reaction/observation cell, and then ECL reaction is generated by electrochemical initiation on the analyte and (pq)(2)Ir(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)(2)Ir(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)(2)Ir(acac)
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