How to validate the attack of dye by various active radicals in photocatalytic reaction?

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Yurii V Geletii

The question does not have a simple answer, it's too general. You need to describe all details of your system

Mouhieddinne Guergueb

It is necessary to make the same reaction but with ascorbic acid which plays the role of radical trap.

Kyle A. Grice

Various radical traps can be used to see if that stops the reaction: BHT, ascorbate, TEMPO, DMPO. If you have EPR you can also potentially identify the radicals that have been trapped.