DSpace
 

DSpace at IIT Bombay >
IITB Publications >
Article >

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/4120

Title: The interplay of hydrophobic and electrostatic effects in the surfactant-induced aggregation/deaggregation of chlorin p(6)
Authors: MISHRA, PP
BHATNAGAR, J
DATTA, A
Keywords: resonance light-scattering
sub-5-fs spectroscopy
porphyrin
aggregation
fluorescence
micelles
ph
assemblies
liposomes
oxygen
Issue Date: 2005
Publisher: AMER CHEMICAL SOC
Citation: JOURNAL OF PHYSICAL CHEMISTRY B, 109(51), 24225-24230
Abstract: The aggregation/deaggregation of chlorin p(6) with the surfactants CTAB, SDS, and TX 100 have been studied by using absorption, fluorescence, and light scattering techniques. The ionic surfactants are found to cause aggregation of fluorophore at submicellar concentrations. The aggregates dissolve at higher surfactant concentrations to yield micellized monomers. This is rationalized by the interplay of electrostatic and hydrophobic effects. A prominent pH effect is observed in the ionic surfactant induced aggregation process as the charge on the fluorophore is controlled by the pH of the medium. Interestingly, the neutral TX-100 also induces aggregation of chlorin p(6) at low concentrations, indicating that hydrophobic effects by themselves can cause aggregation unless there is a hindrance by repulsive electrostatic effects.
URI: http://dx.doi.org/10.1021/jp052682o
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4120
http://hdl.handle.net/10054/4120
ISSN: 1520-6106
Appears in Collections:Article

Files in This Item:

There are no files associated with this item.

View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback