Enhanced activity of fluorinated quaternary ammonium surfactants against Pseudomonas aeruginosa
摘要:
A novel series of fluorinated quaternary bisammonium surfactants has been synthesized in view to optimize their antimicrobial activities against Pseudomonas aeruginosa. As compared with commercial references, most of the new surfactants synthesized exhibit an enhanced activity which is discussed as a function of the nature of the spacer group between the quaternized nitrogen atoms and of the nature of the connector function between the nitrogen atoms and the perfluorinated carbon chains. It appears that the fluorinated "Gemini" surfactants bearing an amide connector can be an interesting alternative to hydrocarbon ammonium salts as preservatives and disinfectants against R aeruginosa. (c) 2008 Elsevier Masson SAS. All rights reserved.
Synthése de nouveaux intermédiaires F-alkyles précurseurs de tensioactifs cationiques hautement fluorés
摘要:
The syntheses of F-alkyl compounds such as(~)[GRAPHICS](~)(where R(F) = C4F9, C6F13, C8F17 and Q = S, O, NH) by the reaction of bromoacetyl bromide with an F-alkyl compound such as RFC2H4QH are reported. These compounds show high reactivity with nucelophilic substrates. They are intended for use as precursors of surfactants or as precursors of monomers for the elaboration of artificial vesicles.
Synthèse de nouveaux tensioactifs cationiques à partir des isothiocyanates de [2-(F-alkyl)éthyl] méthyléther et évaluation de leur pouvoir d'agrégation en vésicules
作者:V. Krier、M.A. Jouani、A. Cambon
DOI:10.1016/s0022-1139(98)00236-x
日期:1998.11
In this work we report the synthesis of [2-(F-alkyl)ethyl] methylether isothiocyanates by isomerisation of the corresponding thiocyanates. The isothiocyanates are very versatile potential synthetic intermediates. Their reactivity with diamines was investigated and the thioureas obtained, are excellent precursors in the synthesis of new perfluoroalkylated surfactants. The aggregation behaviour of some
The introduction of perfluorinated chains in the molecular structure of quaternary ammonium gemini surfactants have led to particularly active antimicrobial agents evaluated in this work. Connectors and spacers were studied in relation with antimicrobial activity in order to determine which molecular parameters are 'critical' for biological activity. (C) 2003 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
Synthèse de 3-[2F-alkyléthylamino]-1,2-époxypropanes et obtention de nouveaux tensioactifs mono ou bicaténaires à tête β-hydroxylée
作者:P.S. Abenin、F. Szönyi、A. Cambon
DOI:10.1016/s0022-1139(00)81248-8
日期:1991.11
In this paper we report the synthesis of new intermediates of the type 3-[2-F-alkyl-ethylamino]-1,2-epoxypropanes which lead simply and with good yields to a large range of fluorinated monotailed, bitailed and hydrogenated/fluorinated bitailed surfactants having a secondary amino group and at least one hydroxy group. Evaluation of their surface properties has allowed the contribution of each hydrophobic tail contained in the hydrogenated and fluorinated bitailed molecules to be demonstrated.