期刊
DYES AND PIGMENTS
卷 83, 期 3, 页码 396-402出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2009.06.013
关键词
Gemini cationic surfactants; Fluorescence anisotropy; Fluorescein sodium salt; Perylene; Pyrene; Coumarin 6
资金
- University of Torino
- Regione Piemonte funds [A167, D14, D67]
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. (C) 2009 Elsevier Ltd. All rights reserved.
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