Nonradiative energy transfer in chromophore-tagged PS-PEO diblock copolymers

被引：1
|
作者：
Cho, Eun-Bum [1 ]
Kim, Dukjoon [1 ]
机构：
[1] Sungkyunkwan Univ, Polymer Technol Inst, Suwon 440746, Gyeonggi Do, South Korea
来源：
MACROMOLECULAR SYMPOSIA | 2007年 / 249卷
关键词：
chain dynamics and release; naphthalene and pyrene chromophore; non-radiative energy transfer; polymer micelles; polystyrene-poly(ethylene oxide) diblock copolymer;
D O I：
10.1002/masy.200750416
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Nonradiative energy transfer fluorescence was used to investigate the micelle behavior of polystyrene-b-poly(ethylene oxide) diblock copoly- mers tagged with either donor naphthalene or acceptor pyrene in solutions and solid films. The effects of the variation in the solvency and micelle collision frequency caused by changing the total block copolymer concentration and the difference in the micelle concentration between polystyrene-poly(ethylene oxide) block copolymers labeled with two different chromophores on the chain release and exchange of micelles were observed. it was noted that the chain exchange of the polymer micelles is clearly observed when the concentration difference and the total micelle concentration are sufficiently large. in the case of the solid film, the NRET efficiency is increased as the molecular weight of the matrix polystyrene homopolymer added is increased.
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页码：437 / 444
页数：8
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