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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Aggregation-Induced Forster Resonance Energy Transfer in Polybenzofulvene/Dye Nanoparticles
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Aggregation-Induced Forster Resonance Energy Transfer in Polybenzofulvene/Dye Nanoparticles

机译：聚苯并富勒烯/染料纳米粒子中聚集诱导的福斯特共振能量转移。

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摘要

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.
机译：聚合物纳米粒子是通用的支架，可以开发智能的多色系统，可以根据特定应用调整其集体的光学性能。将水（非溶剂）添加到蓝色发射pi堆积的聚合物和黄色发射染料的THF稀释溶液中，会诱导纳米颗粒聚合物/染料共聚集。含水量为70％时，伴随着纳米颗粒的收缩，发射效率增加，颜色从蓝色变为黄色。时间分辨荧光分析表明，纳米粒子发射中的转换受聚集诱导的Forster共振能量转移（FRET）过程控制，该过程从聚合物到分子内嵌入的染料，在大约10（-2）M的局部浓度下激活纳米粒子。

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