Electrochemiluminescence
Resonance Energy Transfer
Based on Ru(phen)<sub>3</sub><sup>2+</sup>-Doped Silica Nanoparticles and Its Application in “Turn-on” Detection of Ozone
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Abstract
Both the electrochemiluminescence
(ECL) method for sensitive detection
of ozone and the ECL resonance energy transfer (ECRET) using ozone
have been reported for the first time. It is based on the ECRET of
Ru(phen)<sub>3</sub><sup>2+</sup>-doped silica nanoparticles (RuSiNPs)
to indigo carmine. In the absence of ozone, the ECL of RuSiNPs is
quenched as a result of the ECRET of RuSiNPs to indigo carmine. In
the presence of ozone, the ECL of the system is “turned on”
because ozone can oxidize indigo carmine and interrupt the ECRET from
RuSiNPs to indigo carmine. In this way, it provides a simple ECL sensing
of ozone via the proposed RuSiNP-based ECRET strategy with a linear
range from 0.05–3.0 μM and a limit of detection (LOD)
of 30 nM. The detection takes less than 5 min. This method is also
successfully applied in the analysis of ozone in human serum samples
and atmospheric samples