Electrochemiluminescent reaction between Ru(bpy)32+ and oxygen in nafion film - Details

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Abstract：

For　years,　dissolved　oxygen　(O2)　has　been　regarded　as　a　quenching　species　in　Ru(bpy)　3　2+　electrochemiluminescent　(ECL)　systems;　however,　in　the　present　study,　O2　was　found　to　act　as　a　coreactant　for　Ru(bpy)　3　2+　ECL　in　Nafion　film,　resulting　in　a　strong　ECL　light　emission.　ECL　experiments　were　carried　out　at　a　Ru(bpy)　3　2+/　Nafion　film-modified　glassy　carbon　electrode　(GCE)　immersing　in　air-saturated　phosphate　buffer　solution　(pH　7.4).　Scanning　in　the　potential　range　of　+1.5　to　-1.0　V　resulted　in　three　luminescent　processes,　including　two　potential-dependent　luminescence　peaks　(ECL-1　and　ECL-2),　and　one　potential-independent　persistent　luminescence　emission　(CL-P).　Therein,　ECL-2　occurring　at　potential　less　than　-0.5　V　was　demonstrated　to　be　a　new　chemiluminescent　reactions　between　O2　and　Ru(bpy)　3　2+.　In　ECL-2,　Nafion　film　plays　important　roles　in　stabilizing　Ru(bpy)　3　3+　and　O2　-　radical　essentially　for　producing　the　new　ECL.　Unlike　previously　reported　ECL　processes,　ECL-2　peak　potential　is　dependent　on　the　reduction　potential　of　the　coreactant　(i.e.,　O2)　rather　than　the　redox　potentials　of　the　luminopore,　Ru(bpy)　3　2+,　which　would　provide　a　useful　way　to　probe　O2,　O2　-　radical,　and　their　stabilities　in　electrochemical　reactions.　©　2009　American　Chemical　Society.

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[ 1 ] [Zheng, L.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Department of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
[ 2 ] [Zheng, L.]Fujian ProVincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian, 350108, China
[ 3 ] [Chi, Y.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Department of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
[ 4 ] [Chi, Y.]Fujian ProVincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian, 350108, China
[ 5 ] [Shu, Q.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Department of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
[ 6 ] [Shu, Q.]Fujian ProVincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian, 350108, China
[ 7 ] [Dong, Y.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Department of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
[ 8 ] [Dong, Y.]Fujian ProVincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian, 350108, China
[ 9 ] [Zhang, L.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Department of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
[ 10 ] [Zhang, L.]Fujian ProVincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian, 350108, China
[ 11 ] [Chen, G.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Department of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
[ 12 ] [Chen, G.]Fujian ProVincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian, 350108, China

Reprint 's Address：

[Chi, Y.]Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Department of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China

Email：

y.w.chi@fzu.edu.cn

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Source ：

Journal of Physical Chemistry C

ISSN： 1932-7447

Year： 2009

Issue： 47

Volume： 113

Page： 20316-20321

4 . 2 2 4

JCR@2009

3 . 3 0 0

JCR@2023

JCR Journal Grade：1

CAS Journal Grade：1

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ESI Highly Cited Papers on the List： 0 Unfold All

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