fulltext.study @t Gmail

Locations of methanol in methanol-containing AOT reverse micelles revealed by photophysics of IR125

Paper ID Volume ID Publish Year Pages File Format Full-Text
26650 43969 2013 8 PDF Available
Title
Locations of methanol in methanol-containing AOT reverse micelles revealed by photophysics of IR125
Abstract

Methanol has appeared in many publications reporting reverse micelles (RMs) formation, but it remains debate whether it can be effectively encapsulated by surfactant AOT to form RMs. In this work, we investigated the formation of methanol-containing AOT RMs in n-heptane solvents by using IR125 as a probe. We studied the photophysics of IR125 in methanol/AOT/n-heptane RMs at different loading methanol content (w′0w′0: w′0=[methanol]/[AOT]w′0=[methanol]/[AOT]) by means of steady-state absorption and fluorescence spectroscopies as well as time-resolved fluorescence spectroscopy. We obtained the absorption and fluorescence maxima, fluorescence lifetimes, and reorientation times of IR125 in methanol/AOT/n-heptane RMs at different w′0w′0. We found that the methanol can be effectively encapsulated by AOT in n-heptane solvents to form stable methanol/AOT/n-heptane RMs and the size of methanol/AOT/n-heptane RMs maintains constant with the increase of w′0w′0.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The formation of CH3OH/AOT/n-heptane RMs was explored using IR125 as a probe. ► The photophysics of IR125 in CH3OH/AOT/n-heptane RMs at different w′0w′0 was studied. ► The lifetime of IR125 in CH3OH/AOT/n-heptane RMs decreases upon increasing w′0w′0. ► The size of CH3OH/AOT/n-heptane RMs maintains constant as a function of w′0w′0.

Keywords
Fluorescence lifetime; Fluorescence anisotropy; Reorientation time; IR125; IR144; Methanol AOT reverse micelles
First Page Preview
Locations of methanol in methanol-containing AOT reverse micelles revealed by photophysics of IR125
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 252, 15 January 2013, Pages 116–123
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering