One spiro to shift them all: tuning fluorescent organic nanoparticles emission via steric design
Eléonore Kurek1, Ophélie Dal Pra1, Aliocha Skrzypczak1
1Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33400 Talence, France. chloe.grazon@u-bordeaux.fr.
Abstract:
Three quadrupolar fluorene-based dyes differing only by non-conjugated substituents form fluorescent organic nanoparticles (dFONs) with tunable emission from blue to yellow. A spirocyclic central substituent induces a marked red-shift via altered packing. When internalized into cells, dFONs evolve showing a characteristic blue-shift, enabling fluorescence-based monitoring of nanoparticle integrity and bioimaging performance.
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