Polymeric nanoparticles are versatile scaffolds to develop smart multichromophoric systems whose collective optical properties can be tuned in view of a specific application. Addition of water (nonsolvent) to diluted THF solutions of a blue emitting π-stacked polymer and a yellow emitting dye induces nanoparticle polymer/dye coaggregation. At 70% water content, concomitantly to nanoparticle shrinking, the emission efficiency increases and the color switches from blue to yellow. Time-resolved fluorescence analysis demonstrates that the switch in the nanoparticle emission is governed by an aggregation-induced Förster resonance energy transfer (FRET) process from the polymer to the molecularly embedded dye activated at a local concentration of about 10<sup>-2</sup> M within the nanoparticles.

Villafiorita Monteleone, F., Cappelli, A., Paolino, M., Colombo, M., Cariati, E., Mura, A., et al. (2015). Aggregation-Induced Förster Resonance Energy Transfer in Polybenzofulvene/Dye Nanoparticles. JOURNAL OF PHYSICAL CHEMISTRY. C, 119(33), 18986-18991 [10.1021/acs.jpcc.5b05589].

Aggregation-Induced Förster Resonance Energy Transfer in Polybenzofulvene/Dye Nanoparticles

COLOMBO, MIRIAM;
2015

Abstract

Polymeric nanoparticles are versatile scaffolds to develop smart multichromophoric systems whose collective optical properties can be tuned in view of a specific application. Addition of water (nonsolvent) to diluted THF solutions of a blue emitting π-stacked polymer and a yellow emitting dye induces nanoparticle polymer/dye coaggregation. At 70% water content, concomitantly to nanoparticle shrinking, the emission efficiency increases and the color switches from blue to yellow. Time-resolved fluorescence analysis demonstrates that the switch in the nanoparticle emission is governed by an aggregation-induced Förster resonance energy transfer (FRET) process from the polymer to the molecularly embedded dye activated at a local concentration of about 10-2 M within the nanoparticles.
Articolo in rivista - Articolo scientifico
Physical and Theoretical Chemistry; Electronic, Optical and Magnetic Materials; Surfaces, Coatings and Films; Energy (all)
English
18986
18991
6
Villafiorita Monteleone, F., Cappelli, A., Paolino, M., Colombo, M., Cariati, E., Mura, A., et al. (2015). Aggregation-Induced Förster Resonance Energy Transfer in Polybenzofulvene/Dye Nanoparticles. JOURNAL OF PHYSICAL CHEMISTRY. C, 119(33), 18986-18991 [10.1021/acs.jpcc.5b05589].
Villafiorita Monteleone, F; Cappelli, A; Paolino, M; Colombo, M; Cariati, E; Mura, A; Bongiovanni, G; Botta, C
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/100121
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