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Titolo:
Reflection-absorption FT-IR spectroscopy of vinyl octadecanoate at the air/water interface
Autore:
Sinnamon, BF; Dluhy, RA; Barnes, GT;
Indirizzi:
Univ Queensland, Dept Chem, Brisbane, Qld 4072, Australia Univ QueenslandBrisbane Qld Australia 4072 Brisbane, Qld 4072, Australia Univ Georgia, Dept Chem, Athens, GA 30602 USA Univ Georgia Athens GA USA 30602 Georgia, Dept Chem, Athens, GA 30602 USA
Titolo Testata:
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
fascicolo: 1-3, volume: 156, anno: 1999,
pagine: 215 - 222
SICI:
0927-7757(19991015)156:1-3<215:RFSOVO>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
AIR-WATER-INTERFACE; SURFACE-PRESSURE-GRADIENTS; NORMAL-ALKYL CHAINS; H STRETCHING MODES; PHASE-TRANSITIONS; PHOSPHOLIPID MONOLAYERS; INFRARED-SPECTROSCOPY; LANGMUIR MONOLAYERS; FILMS; HENEICOSANOL;
Keywords:
reflection-absorption FT-IR spectroscopy; monolayers, FT-IR spectra; vinyl octadecanoate monolayers; vinyl stearate monolayers; monolayer structure by FT-IR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Barnes, GT Univ Queensland, Dept Chem, Brisbane, Qld 4072, Australia Univ Queensland Brisbane Qld Australia 4072 ld 4072, Australia
Citazione:
B.F. Sinnamon et al., "Reflection-absorption FT-IR spectroscopy of vinyl octadecanoate at the air/water interface", COLL SURF A, 156(1-3), 1999, pp. 215-222

Abstract

Reflection-absorption Fourier transform infrared (RA FT-IR) spectra of spread monolayers of vinyl octadecanoate have been obtained for a range of surface pressures at 292 K. Unpolarised and s- and p-polarised radiation at 30degrees angle of incidence have been used. Results in the C-H stretching region show that even at very low surface pressures the monolayer appears toconsist of condensed domains where the acyl chains are highly ordered and densely packed. At higher surface pressures the average packing density is higher, but otherwise the spectra are unaltered, showing that the acyl chains remain highly ordered with few gauche bonds throughout the accessible range of surface pressure (0.1 to 18 mN m(-1)). There was no appreciable change in the spectrum when the monolayer passed through the LC to S phase transition. (C) 1999 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/06/20 alle ore 17:44:25