Electrochemiluminescence of tris(8-hydroxyquinoline-5-sulfonic acid)aluminum(III) in aqueous solution

Brian D. Muegge; Sean Brooks; Mark M. Richter

doi:10.1021/ac026152p

Electrochemiluminescence of tris(8-hydroxyquinoline-5-sulfonic acid)aluminum(III) in aqueous solution

Brian D. Muegge
, Sean Brooks
, Mark M. Richter

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

The electrochemiluminescence (ECL) of tris(8-hydroxyquinoline-5-sulfonic acid)aluminum(III) in aqueous solution is reported. ECL is generated by complexing aluminum ions with the chelating agent 8-hydroxyquinoline-5-sulfonic acid (HQS) to form Al(HQS)₃, followed by oxidation in the presence of tri-n-propylamine (TPrA). The ECL intensity peaks a potential corresponding to oxidation of both TPrA and Al(HQS)₃, and the ECL emission spectrum (λ_max = 499 nm) matches the photoluminescence emission spectrum, indicating that the emission is from a Al-(HQS)₃* excited state. ECL efficiencies (φ_ecl, photons generated per redox event) of 0.002 using Ru(bpy)₃²⁺ (φ_ecl = 1) as relative standard. Conditions for ECL emission were optimized and used to generate a calibration curve that was linear over the 7 × 10^-6-4 × 10^-4 M (5281 mg/L (ppm)) range with a theoretical limit of detection of 1 ppm. The ECL of several metal ions other than aluminum with HQS and effects on Al(HQS)₃ ECL were also examined.

Original language	English
Pages (from-to)	1102-1105
Number of pages	4
Journal	Analytical Chemistry
Volume	75
Issue number	5
DOIs	https://doi.org/10.1021/ac026152p
State	Published - Mar 1 2003

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@article{e1143d0717f1426386da83e97a131daa,

title = "Electrochemiluminescence of tris(8-hydroxyquinoline-5-sulfonic acid)aluminum(III) in aqueous solution",

abstract = "The electrochemiluminescence (ECL) of tris(8-hydroxyquinoline-5-sulfonic acid)aluminum(III) in aqueous solution is reported. ECL is generated by complexing aluminum ions with the chelating agent 8-hydroxyquinoline-5-sulfonic acid (HQS) to form Al(HQS)3, followed by oxidation in the presence of tri-n-propylamine (TPrA). The ECL intensity peaks a potential corresponding to oxidation of both TPrA and Al(HQS)3, and the ECL emission spectrum (λmax = 499 nm) matches the photoluminescence emission spectrum, indicating that the emission is from a Al-(HQS)3* excited state. ECL efficiencies (φecl, photons generated per redox event) of 0.002 using Ru(bpy)32+ (φecl = 1) as relative standard. Conditions for ECL emission were optimized and used to generate a calibration curve that was linear over the 7 × 10-6-4 × 10-4 M (5281 mg/L (ppm)) range with a theoretical limit of detection of 1 ppm. The ECL of several metal ions other than aluminum with HQS and effects on Al(HQS)3 ECL were also examined.",

author = "Muegge, \{Brian D.\} and Sean Brooks and Richter, \{Mark M.\}",

year = "2003",

month = mar,

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doi = "10.1021/ac026152p",

language = "English",

volume = "75",

pages = "1102--1105",

journal = "Analytical Chemistry",

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TY - JOUR

T1 - Electrochemiluminescence of tris(8-hydroxyquinoline-5-sulfonic acid)aluminum(III) in aqueous solution

AU - Muegge, Brian D.

AU - Brooks, Sean

AU - Richter, Mark M.

PY - 2003/3/1

Y1 - 2003/3/1

N2 - The electrochemiluminescence (ECL) of tris(8-hydroxyquinoline-5-sulfonic acid)aluminum(III) in aqueous solution is reported. ECL is generated by complexing aluminum ions with the chelating agent 8-hydroxyquinoline-5-sulfonic acid (HQS) to form Al(HQS)3, followed by oxidation in the presence of tri-n-propylamine (TPrA). The ECL intensity peaks a potential corresponding to oxidation of both TPrA and Al(HQS)3, and the ECL emission spectrum (λmax = 499 nm) matches the photoluminescence emission spectrum, indicating that the emission is from a Al-(HQS)3* excited state. ECL efficiencies (φecl, photons generated per redox event) of 0.002 using Ru(bpy)32+ (φecl = 1) as relative standard. Conditions for ECL emission were optimized and used to generate a calibration curve that was linear over the 7 × 10-6-4 × 10-4 M (5281 mg/L (ppm)) range with a theoretical limit of detection of 1 ppm. The ECL of several metal ions other than aluminum with HQS and effects on Al(HQS)3 ECL were also examined.

AB - The electrochemiluminescence (ECL) of tris(8-hydroxyquinoline-5-sulfonic acid)aluminum(III) in aqueous solution is reported. ECL is generated by complexing aluminum ions with the chelating agent 8-hydroxyquinoline-5-sulfonic acid (HQS) to form Al(HQS)3, followed by oxidation in the presence of tri-n-propylamine (TPrA). The ECL intensity peaks a potential corresponding to oxidation of both TPrA and Al(HQS)3, and the ECL emission spectrum (λmax = 499 nm) matches the photoluminescence emission spectrum, indicating that the emission is from a Al-(HQS)3* excited state. ECL efficiencies (φecl, photons generated per redox event) of 0.002 using Ru(bpy)32+ (φecl = 1) as relative standard. Conditions for ECL emission were optimized and used to generate a calibration curve that was linear over the 7 × 10-6-4 × 10-4 M (5281 mg/L (ppm)) range with a theoretical limit of detection of 1 ppm. The ECL of several metal ions other than aluminum with HQS and effects on Al(HQS)3 ECL were also examined.

UR - https://www.scopus.com/pages/publications/0037355678

U2 - 10.1021/ac026152p

DO - 10.1021/ac026152p

M3 - Article

C2 - 12641229

AN - SCOPUS:0037355678

SN - 0003-2700

VL - 75

SP - 1102

EP - 1105

JO - Analytical Chemistry

JF - Analytical Chemistry

IS - 5

ER -

Electrochemiluminescence of tris(8-hydroxyquinoline-5-sulfonic acid)aluminum(III) in aqueous solution

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