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I would like to build a FRET-based oxidation sensor for detecting very high 
oxidation potential ROS.   Hot ROS will cleave the linker, allowing donor 
and acceptor to separate, killing FRET.  Amazingly, preliminaries with 
fluorescein and TAMRA showed encouraging results.  Now I’d like to try 
some FRET pairs where the dyes are much more resistant to oxidation in 
pH 4 water (pH raised and CTAB was added to read FRET).  Donors such as 
Alexa or Atto series, (488 and 550) come to mind as photostability could 
well correlate to oxidative resistance.  Other suggestions, experience 
appreciated.