Energy transfer mediated fluorescence from blended conjugated polymer nanoparticles

被引:174
作者
Wu, Changfeng
Peng, Hongshang
Jiang, Yunfei
McNeill, Jason [1 ]
机构
[1] Clemson Univ, Dept Chem, Clemson, SC 29634 USA
[2] Clemson Univ, Ctr Opt Mat Sci & Engn Technol, Clemson, SC 29634 USA
关键词
D O I
10.1021/jp0618126
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Nanoparticles consisting of a derivative of the blue-emitting conjugated polymer polyfluorene doped with green-, yellow-, and red-emitting conjugated polymers were prepared by a reprecipitation method. The nanoparticles can be described as a system of densely packed chromophores that exhibit efficient energy transfer from the host to the dopant polymers. Fluorescence quenching analysis of the host polymer as a function of the dopant concentration indicates that one energy acceptor molecule can effectively quench 90% of the fluorescence of a nanoparticle consisting of 100-200 host conjugated polymer molecules. A nanoparticle energy transfer model was developed that successfully describes the quenching behavior of a small number of highly efficient energy acceptors per nanoparticle. The fluorescence brightness of the blended polymer nanoparticles was determined to be much higher than that of inorganic quantum dots and dye-loaded silica particles of similar dimensions. The combination of high fluorescence brightness and tunable fluorescence of these blended nanoparticles is promising for ultrasensitive fluorescence-based assays.
引用
收藏
页码:14148 / 14154
页数:7
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