Title of article :
Electrochemiluminescence of Tris(8-hydroxyquinoline-5-sulfonic acid)aluminum(III) in Aqueous Solution
Author/Authors :
Richter، Mark M. نويسنده , , Muegge، Brian D. نويسنده , , Brooks، Sean نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2003
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 (lambda)max = 499 nm) matches the photoluminescence emission spectrum, indicating that the emission is from a Al(HQS)3* excited state. ECL efficiencies (phi)ecl, photons generated per redox event) of 0.002 using Ru(bpy)3^2+ ((phi)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 (5-281 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.
Keywords :
Alloys , Friction/wear , Wear coefficient , Modelling , Metal-matrix composites (MMCs)
Journal title :
Analytical Chemistry
Journal title :
Analytical Chemistry