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Evidence for charge transfer between quinacridone nanocrystals and riboflavin. (a) PL of a pure QA nanocrystal film and a QA-riboflavin myristate (Rf) blend. (b) Light-induced electron paramagnetic resonance of a blend containing quinacridone nanocrystals and Rf. The experiments in (a) and (b) evidence a light induced charge transfer. (c) Sketch of the electron-transfer process after photoexcitation of an electron–hole pair.
