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Title: Characterizing interfacial friction in bis(2-ethylhexyl) sodium sulfosuccinate reverse micelles from photoisomerization studies of carbocyanine derivatives

Abstract

Photoisomerization of two carbocyanine derivatives has been examined in bis(2-ethylhexyl) sodium sulfosuccinate (AOT) reverse micelles to understand the factors that govern this process in the interfacial region of organized assemblies. To this effect, fluorescence lifetimes and quantum yields of 3,3{sup '}-diethyloxadicarbocyanine iodide and merocyanine 540 have been measured in AOT/isooctane/water and AOT/cyclohexane/water reverse micellar systems as a function of the mole ratio of water to the surfactant, W. The nonradiative rate constants, which have been identified as the rates of photoisomerization for these solutes, were obtained from the experimentally measured parameters. The steady rise and subsequent saturation observed in the nonradiative rate constants upon increasing W has been rationalized in terms of micellar packing. An inverse correlation has been obtained between the nonradiative rate constants and the critical packing parameter, indicating that the interfacial friction experienced by the solute molecule is essentially described by this parameter.

Authors:
;  [1]
  1. Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085 (India)
Publication Date:
OSTI Identifier:
21559977
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 134; Journal Issue: 2; Other Information: DOI: 10.1063/1.3529013; (c) 2011 American Institute of Physics; Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AUGMENTATION; COLLOIDS; CORRELATIONS; CYCLOHEXANE; FLUORESCENCE; FRICTION; IODIDES; ISOMERIZATION; MICELLAR SYSTEMS; MOLECULES; PACKINGS; PHOTOCHEMISTRY; REACTION KINETICS; SATURATION; SODIUM; SOLUTES; STOWING; SURFACTANTS; WATER; ALKALI METALS; ALKANES; CHEMICAL REACTIONS; CHEMISTRY; CYCLOALKANES; DISPERSIONS; ELEMENTS; EMISSION; HALIDES; HALOGEN COMPOUNDS; HYDROCARBONS; HYDROGEN COMPOUNDS; IODINE COMPOUNDS; KINETICS; LUMINESCENCE; METALS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHOTON EMISSION

Citation Formats

Gangamallaiah, V, and Dutt, G B. Characterizing interfacial friction in bis(2-ethylhexyl) sodium sulfosuccinate reverse micelles from photoisomerization studies of carbocyanine derivatives. United States: N. p., 2011. Web. doi:10.1063/1.3529013.
Gangamallaiah, V, & Dutt, G B. Characterizing interfacial friction in bis(2-ethylhexyl) sodium sulfosuccinate reverse micelles from photoisomerization studies of carbocyanine derivatives. United States. https://doi.org/10.1063/1.3529013
Gangamallaiah, V, and Dutt, G B. 2011. "Characterizing interfacial friction in bis(2-ethylhexyl) sodium sulfosuccinate reverse micelles from photoisomerization studies of carbocyanine derivatives". United States. https://doi.org/10.1063/1.3529013.
@article{osti_21559977,
title = {Characterizing interfacial friction in bis(2-ethylhexyl) sodium sulfosuccinate reverse micelles from photoisomerization studies of carbocyanine derivatives},
author = {Gangamallaiah, V and Dutt, G B},
abstractNote = {Photoisomerization of two carbocyanine derivatives has been examined in bis(2-ethylhexyl) sodium sulfosuccinate (AOT) reverse micelles to understand the factors that govern this process in the interfacial region of organized assemblies. To this effect, fluorescence lifetimes and quantum yields of 3,3{sup '}-diethyloxadicarbocyanine iodide and merocyanine 540 have been measured in AOT/isooctane/water and AOT/cyclohexane/water reverse micellar systems as a function of the mole ratio of water to the surfactant, W. The nonradiative rate constants, which have been identified as the rates of photoisomerization for these solutes, were obtained from the experimentally measured parameters. The steady rise and subsequent saturation observed in the nonradiative rate constants upon increasing W has been rationalized in terms of micellar packing. An inverse correlation has been obtained between the nonradiative rate constants and the critical packing parameter, indicating that the interfacial friction experienced by the solute molecule is essentially described by this parameter.},
doi = {10.1063/1.3529013},
url = {https://www.osti.gov/biblio/21559977}, journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 2,
volume = 134,
place = {United States},
year = {Fri Jan 14 00:00:00 EST 2011},
month = {Fri Jan 14 00:00:00 EST 2011}
}