A potential-controlled switch on/off mechanism for selective excitation in mixed electrochemiluminescent systems
Citations Over TimeTop 10% of 2012 papers
Abstract
We demonstrate the complete, rapid, and reversible switching between the emissions from two electrogenerated chemiluminescence (ECL) systems contained within the same solution, controlled by simple modification of the applied potential. The fundamental bases of the approach are the ability to selectively ‘switch on’ luminophores at distinct oxidation potentials, and an intriguing observation that the emission from the well-known electrochemiluminescent complex, fac-Ir(ppy)3, (where ppy is 2-phenylpyridinato), can be selectively ‘switched-off’ at high overpotentials. The dependence of this phenomenon on high concentrations of the co-reactant implicates quenching of the excited [Ir(ppy)3]* state by electron transfer. Rapid spectral scanning during modulation of the applied potential reveals well resolved maxima for mixtures comprising either green and red or green and blue luminophores, illustrating the vast potential of this approach for multiplexed ECL detection.
Related Papers
- → Recent advances in II-VI quantum dots based-signal strategy of electrochemiluminescence sensor(2022)14 cited
- → Simple and Sensitive Electrochemiluminescence Method for Determination of Bisphenol a Based on its Inhibitory Effect on the Electrochemiluminescence of Luminol(2008)13 cited
- → Current Development of Quantum Dots Based Electrochemiluminescence Immunosensors(2013)
- Electrochemiluminescence of quantum dots and their applications in bioassay(2014)
- Recent Developments in Chemiluminescence Sensors(2004)