Enhanced emission and its switching in fluorescent organic nanoparticles

被引：1882
作者：
An, BK
Kwon, SK
Jung, SD
Park, SY [1 ]
机构：
[1] Seoul Natl Univ, Sch Mat Sci & Engn, Seoul 151744, South Korea
[2] Gyeongsang Natl Univ, Dept Polymer Sci & Engn, Chinju 660701, South Korea
[3] Elect & Telecommun Res Inst, Basic Res Lab, Taejon 305350, South Korea
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2002年 / 124卷 / 48期
关键词：
D O I：
10.1021/ja0269082
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A new class of organic nanoparticles (CN-MBE nanoparticles) with a mean diameter of ca. 30-40 nm, which exhibit a strongly enhanced fluorescence emission, were prepared by a simple reprecipitation method. CN-MBE (1-cyano-trans-1,2-bis-(4'-methylbiphenyl)ethylene) is very weakly fluorescent in solution, but the intensity is increased by almost 700 times in the nanoparticles. Enhanced emission in CN-MBE nanoparticles is attributed to the synergetic effect of intramolecular planarization and J-type aggregate formation (restricted excimer formation) in nanopaticles. On/off fluorescence switching for organic vapor was demonstrated with CN-MBE nanoparticles.
引用
收藏
页码：14410 / 14415
页数：6
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