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

作者：Villafiorita Monteleone Francesca^*; Cappelli Andrea; Paolino Marco; Colombo Miriam; Cariati Elena; Mura Andrea; Bongiovanni Giovanni; Botta Chiara

来源：Journal of Physical Chemistry C, 2015, 119(33): 18986-18991.

DOI：10.1021/acs.jpcc.5b05589

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 pi-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 Forster 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.

• 出版日期2015-8-20