Efficient green-colored electrochemiluminescence from cyclometalated iridium(III) complex
- Authors
- Shin, Ik-Soo; Yoon, Sook; Kim, Jae Il; Lee, Jin-Kyu; Kim, Tae Hyun; Kim, Hasuck
- Issue Date
- 1-Jul-2011
- Publisher
- Pergamon Press Ltd.
- Keywords
- Electrogenerated chemiluminescence; Electrochemiluminescence (ECL); Iridium(III) complex; Reductive-oxidation
- Citation
- Electrochimica Acta, v.56, no.17, pp 6219 - 6223
- Pages
- 5
- Journal Title
- Electrochimica Acta
- Volume
- 56
- Number
- 17
- Start Page
- 6219
- End Page
- 6223
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/16340
- DOI
- 10.1016/j.electacta.2011.03.075
- ISSN
- 0013-4686
1873-3859
- Abstract
- The spectroscopy, electrochemistry, and electrochemiluminescence (ECL) of cyclometalated iridium(III) bis(2-(p-tolyl)pyridinato-N, C-2') (picolinate) [(tpy)(2)lr(pico)] was investigated. (tpy)(2)lr(pico) shows high photoluminescence efficiency (Phi(PL) = similar to 0.31) and quasi-reversible redox behaviors in acetonitrile solution. Intense green ECL was observed from all three modes of ECL generation (annihilation, oxidative-reduction, and reductive-oxidation). Relative ECL efficiencies with or without coreactants from (tpy)(2)lr(pico) were estimated using Ru(bpy)(3)(2+) (bpy, 2,2'-bipyridine) as a relative standard. Typically, in the reductive-oxidation process with peroxodisulfate (S2O82-), (tpy)(2)lr(pico) produces 8-fold more efficient ECL at approximately 531 nm than Ru(bpy)(3)(2). This efficient green ECL indicates potential for the development of multicolored ECL analysis in addition to standard Ru(bpy)(3)(2+) systems. (C) 2011 Elsevier Ltd. All rights reserved.
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