Fluorescence probing of interior, interfacial, and exterior regions in solution aggregates of poly(ethylene oxide)poly(propylene oxide)-poly(ethylene oxide) triblock copolymers

被引：118

作者：

Grant, CD ^{[1
]}

DeRitter, MR ^{[1
]}

Steege, KE ^{[1
]}

Fadeeva, TA ^{[1
]}

Castner, EW ^{[1
]}

机构：

[1] Rutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ 08854 USA

来源：

LANGMUIR | 2005年 / 21卷 / 05期

关键词：

D O I：

10.1021/la047560m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Fluorescence spectroscopy is used to probe local environments within regions of different polarity and hydrophobicity in aqueous aggregates of PEO109-PPO41-PEO109 triblock copolymers. These copolymer aggregates have well characterized microphases in aqueous solution. Concentrations and temperatures for our studies are chosen such that the copolymers are in unimer, micellar, or micellar hydrogel forms. The observed fluorescence spectra and lifetimes from solutions individually labeled with each of the three coumarin probes report on the changes in the local polarity of the core, exterior, interfacial, and corona regions of these copolymer aggregates. This multiple fluorescence probe methodology will be straightforward to apply in general to problems in polymer and biopolymer aggregates, especially those that display strong hydrophobic effects.

引用

页码：1745 / 1752

页数：8

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