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Fluorescence decay curves of fluorescein (13) in the absence (blank sample: white circles) and in the presence of the reference antioxidant Trolox (10) at 0.63 (red plus signs) and 2.50 μM (black cross signs), and of studied monomers 2 (red triangles), 3 (black circles), 4 (blue squares) and their dimers 6 (blue triangles), 7 (open pink squares) and 8 (orange triangles) at concentration 0.50 μM.
