Viscosity of the Hydrocarbon Region of Micelles. Measurement by Excimer Fluorescence

Henry J. Pownall; Louis C. Smith

doi:10.1021/ja00791a009

Viscosity of the Hydrocarbon Region of Micelles. Measurement by Excimer Fluorescence

Henry J. Pownall, Louis C. Smith

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Abstract

The relative intensities of excimer and monomer fluorescence of pyrene are shown to be a simple linear function of the viscosity of a homologous series of solvents. This relationship may be represented by η = kC′_h, where C′_h is the pyrene concentration at which half the fluorescence intensity appears in both the excimer and monomer form. The constant k includes both instrumental and theoretical parameters and is determined empirically. These results have been used to measure the viscosity of the hydrocarbon region of micelles labeled with pyrene. The viscosities of alkyltrimethylammonium bromides with alkyl chain lengths from C₁₀ to C₁₈ were in the range of 125 to 200 cP.

Original language	English (US)
Pages (from-to)	3136-3140
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	95
Issue number	10
DOIs	https://doi.org/10.1021/ja00791a009
State	Published - May 1 1973

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja00791a009

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title = "Viscosity of the Hydrocarbon Region of Micelles. Measurement by Excimer Fluorescence",

abstract = "The relative intensities of excimer and monomer fluorescence of pyrene are shown to be a simple linear function of the viscosity of a homologous series of solvents. This relationship may be represented by η = kC′h, where C′h is the pyrene concentration at which half the fluorescence intensity appears in both the excimer and monomer form. The constant k includes both instrumental and theoretical parameters and is determined empirically. These results have been used to measure the viscosity of the hydrocarbon region of micelles labeled with pyrene. The viscosities of alkyltrimethylammonium bromides with alkyl chain lengths from C10 to C18 were in the range of 125 to 200 cP.",

author = "Pownall, {Henry J.} and Smith, {Louis C.}",

year = "1973",

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T1 - Viscosity of the Hydrocarbon Region of Micelles. Measurement by Excimer Fluorescence

AU - Pownall, Henry J.

AU - Smith, Louis C.

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N2 - The relative intensities of excimer and monomer fluorescence of pyrene are shown to be a simple linear function of the viscosity of a homologous series of solvents. This relationship may be represented by η = kC′h, where C′h is the pyrene concentration at which half the fluorescence intensity appears in both the excimer and monomer form. The constant k includes both instrumental and theoretical parameters and is determined empirically. These results have been used to measure the viscosity of the hydrocarbon region of micelles labeled with pyrene. The viscosities of alkyltrimethylammonium bromides with alkyl chain lengths from C10 to C18 were in the range of 125 to 200 cP.

AB - The relative intensities of excimer and monomer fluorescence of pyrene are shown to be a simple linear function of the viscosity of a homologous series of solvents. This relationship may be represented by η = kC′h, where C′h is the pyrene concentration at which half the fluorescence intensity appears in both the excimer and monomer form. The constant k includes both instrumental and theoretical parameters and is determined empirically. These results have been used to measure the viscosity of the hydrocarbon region of micelles labeled with pyrene. The viscosities of alkyltrimethylammonium bromides with alkyl chain lengths from C10 to C18 were in the range of 125 to 200 cP.

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JF - Journal of the American Chemical Society

SN - 0002-7863

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ER -

Viscosity of the Hydrocarbon Region of Micelles. Measurement by Excimer Fluorescence

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