Surfactant-induced fluorescent sensor activity enhancement of tryptophan at various pH

被引:13
作者
Bandyopadhyay, Prasun [1 ]
Saha, Krishnendu [1 ]
机构
[1] Unilever Res India, Bangalore 560066, Karnataka, India
关键词
D O I
10.1016/j.cplett.2008.03.076
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
Photophysical properties of an amino acid (tryptophan) have been studied in different aqueous micellar environments at various pH using steady-state emission spectroscopy. We report herein tuning of the sensory capability of tryptophan in biomimicking ionic micellar nanocage at various pH. In an un-buffered aqueous solution (or at pH 7) and pH 4 the fluorescence quenching efficiency of tryptophan in the presence of trace metal ion Cu(2+) increases significantly around critical micelle concentration (CMC) of an anionic surfactant sodium dodecyl sulfate (SDS). At pH 11 fluorescence quenching efficiency of tryptophan increases significantly around CMC of a cationic surfactant cetyl trimethyl ammonium bromide (CTAB). (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:227 / 231
页数:5
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