Four fluorophores of different nature, structure and properties were employed as probes for the characterization of a series of alkanediyl-alpha,omega-bis(alkyldimethyl ammonium bromide) surfactants. Pyrene and 3-(2-Benzothiazolyl)-7-(diethylamino)coumarin (coumarin 6) fluorescence intensity as well as coumarin 6 and fluorescein sodium salt fluorescence anisotropy were used to determine cmc whilst coumarin 6, fluorescein sodium salt and perylene fluorescence anisotropy was exploited to provide information on micellar structure; cmc values were confirmed using conductivity measurements. Conductivity data were analysed by means of a method which reveals the formation of ion pairs or premicellar aggregates; this approach was useful to justify and confirm results obtained using fluorescence.

Characterization of monomeric and gemini cationic amphiphilic molecules by fluorescence intensity and anisotropy. Part 2

BARBERO, Nadia;QUAGLIOTTO, Pierluigi;BAROLO, CLAUDIA;ARTUSO, EMMA;BUSCAINO, Roberto;VISCARDI, Guido
2009

Abstract

Four fluorophores of different nature, structure and properties were employed as probes for the characterization of a series of alkanediyl-alpha,omega-bis(alkyldimethyl ammonium bromide) surfactants. Pyrene and 3-(2-Benzothiazolyl)-7-(diethylamino)coumarin (coumarin 6) fluorescence intensity as well as coumarin 6 and fluorescein sodium salt fluorescence anisotropy were used to determine cmc whilst coumarin 6, fluorescein sodium salt and perylene fluorescence anisotropy was exploited to provide information on micellar structure; cmc values were confirmed using conductivity measurements. Conductivity data were analysed by means of a method which reveals the formation of ion pairs or premicellar aggregates; this approach was useful to justify and confirm results obtained using fluorescence.
83
396
402
http://www.journals.elsevier.com/dyes-and-pigments/
Gemini Cationic Surfactants; Fluorescence Anisotropy; Fluorescein Sodium Salt; Perylene; Pyrene; Coumarin 6; Critical Micelle Concentration; Alkanediyl-Alpha; Omega-Bis(Dimethylalkylammonium Bromide) Surfactants; Angle Neutron-Scattering; Spacer Chain-Length; Dimeric Surfactants; Conductivity; Membranes; Dynamics
Barbero N; Quagliotto P; Barolo C; Artuso E; Buscaino R; Viscardi G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/75791
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