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Titolo:
Mixing of partially fluorinated carboxylic acids and their hydrocarbon analogues with dipalmitoylphosphatidylcholine at the air-water interface
Autore:
Lehmler, HJ; Jay, M; Bummer, PM;
Indirizzi:
Univ Kentucky, Med Ctr, Grad Ctr Toxicol, Lexington, KY 40536 USA Univ Kentucky Lexington KY USA 40536 Ctr Toxicol, Lexington, KY 40536 USA Univ Kentucky, Coll Pharm, Lexington, KY 40536 USA Univ Kentucky Lexington KY USA 40536 Coll Pharm, Lexington, KY 40536 USA
Titolo Testata:
LANGMUIR
fascicolo: 26, volume: 16, anno: 2000,
pagine: 10161 - 10166
SICI:
0743-7463(200012)16:26<10161:MOPFCA>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
MIXED INSOLUBLE MONOLAYERS; PHOSPHOLIPID MONOLAYERS; MOLECULAR PACKING; FATTY-ACIDS; FLUOROCARBON; SURFACTANTS; MICELLES; AMPHIPHILES; MISCIBILITY; LIPOSOMES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Lehmler, HJ Univ Kentucky, Med Ctr, Grad Ctr Toxicol, 306 HSRB, Lexington,KY 40536 USA Univ Kentucky 306 HSRB Lexington KY USA 40536 on, KY 40536 USA
Citazione:
H.J. Lehmler et al., "Mixing of partially fluorinated carboxylic acids and their hydrocarbon analogues with dipalmitoylphosphatidylcholine at the air-water interface", LANGMUIR, 16(26), 2000, pp. 10161-10166

Abstract

The interaction of partially fluorinated carboxylic acids with a biologically relevant surfactant, dipalmitoylphosphatidylcholine (DPPC), was investigated at the air-water interface. The compression isotherms of mixtures of three partially fluorinated carboxylic acids (1-3) and their hydrocarbon analogues (4-6) with DPPC were recorded at various compositions on hydrochloric acid (pH = 1.9, 32 +/- 2 degreesC) as a subphase. The mixing behavior was assessed by analyzing the concentration dependence of the average molecular area at constant film pressure (area/mole fraction or A-X diagram). All six carboxylic acids (1-6) show a negative deviation from ideal behavior atsurface pressures between 3 and 25 mN/m, which is indicative of an attractive interaction with DPPC in the mixed monolayer at the air-water interface. With the exception of nonafluorpentadecanoic acid (1), all carboxylic acids investigated show a concentration dependence of the breakpoint of the phase transition from the liquid-expanded to the liquid-condensed state, which supports the interpretation of the A-X diagrams.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 16:44:26