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Light Upconverting soft particles: Triplet-triplet annihilation in the phospholipid bilayer of self-assembled vesicles

Poznik, Michal ; Faltermeier, Uwe ; Dick, Bernhard ; König, Burkhard



Zusammenfassung

Large unilamellar vesicles (100 nm) were functionalised to obtain supramolecular particles capable of light upconversion in pure aqueous media. Triplet-triplet annihilation of diphenylanthracene (DPA) leading to delayed fluorescence at 420 nm was used to up-convert the light absorbed by embedded metal complex sensitisers. The lipid type and the chromophore position in the membrane affect the TTA intensity, which remains constant over a large concentration range.


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