Fluorescence Switching Based on the Redox Reaction of Quinones Induced by Complexation with Rare-Earth Metals

The fluorescence emission switching behavior based on the redox reaction of quinone-Eu complexes was investigated. The addition of caused positive shifts in the potential and induced a fully irreversible two-electron redox reaction around 0.2 V, which is similar to that of the proton. In the presence of the redox reaction of quinones takes place accompanied by ion transfer, and the redox activation efficiency of is 100 times greater than that of the proton. The emission is investigated by complexation with the hydroquinone. Here, we show that we first found this fluorescence switching based on the redox reaction of the benzoquinone-hydroquinone exchange. © 2004 The Electrochemical Society. All rights reserved.