pH-Controlled "Off-On-Off" Switch Based on Cu2+-Mediated Pyrene Fluorescence in a PAA-SDS Micelle Aggregated Supramolecular System

被引：32

作者：

Bandyopadhyay, Prasun ^{[1
]}

Ghosh, Amit K. ^{[1
]}

机构：

[1] Unilever Res India, Bangalore 560066, Karnataka, India

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2009年 / 113卷 / 41期

关键词：

SODIUM DODECYL-SULFATE;

D O I：

10.1021/jp907337r

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

We report herein the fluorescence response of pyrene in the presence of sodium dodecyl sulfate (SDS) micelle and poly(acrylic acid) (PAA) with Cu2+ as an ionic quencher. Pyrene present in the PAA-SDS complex is quenched by Cu2+ at pH similar to 2 ("off" state). Quenched pyrene emission is recovered at pH similar to 8 ("on" state). Due to easy protonation and deprotonation of the PAA chain in aqueous solution, this pH-controlled micellar ternary system exhibits a highly reversible "off-on-off" switch of the pyrene emission.

引用

页码：13462 / 13464

页数：3

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