Investigation on the conformations of AOT in water-in-oil microemulsions using 2D-ATR-FTIR correlation spectroscopy

被引:15
作者
Lai, Zuliang [1 ]
Wu, Peiyi [1 ]
机构
[1] Fudan Univ, Dept Macromol Sci, Minist Educ, Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China
关键词
AOT; microemulsion; ATR; 2D-IR correlation spectroscopy;
D O I
10.1016/j.molstruc.2008.01.017
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The carbonyl groups of sodium bis(2-ethylhexyl) sulfosuccinate (AOT) in the water-in-oil (W/O) microemulsions of AOT/tetrachloromethane/water were investigated by using two-dimensional attenuated total reflection Fourier transform infrared (2D-ATR-FTIR) correlation spectroscopy under a perturbation of temperature. The results of a traditional curve fitting method were compared with the 2D correlation spectra results. The peaks at 1718 and 1736 cm(-1) were assigned to different carbonyl groups in trans conformation and gauche conformation of AOT molecules, respectively. With the increase of temperature, the trans conformation increased quickly at the lower temperature below 35 degrees C and decreased slowly at the higher temperature. The special phenomenon owed to the composition and decomposition of the hydrogen bonding between water of the inner polar core and carbonyl groups of AOT molecules. Two new peaks at 1707 and 1747 cm(-1) in the 2D correlation spectra implied the process of the transition of AOT molecule conformation and the deviation of correlation coefficients of curve fitting method. 2D-ATR-FTIR correlation spectroscopy exhibited the superiority over the traditional curve fitting method. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:236 / 241
页数:6
相关论文
共 31 条
[1]   Structure, stability, and hydration of a polypeptide in AOT reverse micelles [J].
Abel, S ;
Waks, M ;
Urbach, W ;
Marchi, M .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (02) :382-383
[2]   Molecular modeling and simulations of AOT-Water reverse micelles in isooctane: Structural and dynamic properties [J].
Abel, S ;
Sterpone, F ;
Bandyopadhyay, S ;
Marchi, M .
JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (50) :19458-19466
[3]   Solubilization in AOT-water reverse micelles. Effect of the external solvent [J].
Abuin, E ;
Lissi, E ;
Duarte, R ;
Silber, JJ ;
Biasutti, MA .
LANGMUIR, 2002, 18 (22) :8340-8344
[4]   FT-IR and dielectric study of water/AOT liquid crystals [J].
Calandra, P ;
Caponetti, E ;
Martino, DC ;
D'Angelo, P ;
Minore, A ;
Liveri, VT .
JOURNAL OF MOLECULAR STRUCTURE, 2000, 522 :165-178
[5]   Physicochemical investigation of acrylamide solubilization in sodium bis(2-ethylhexyl)sulfosuccinate and lecithin reversed micelles [J].
Calandra, P ;
Giordano, C ;
Ruggirello, A ;
Liveri, VT .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2004, 277 (01) :206-214
[6]   Physico-chemical investigation of the state of cyanamide confined in AOT and lecithin reversed micelles [J].
Calandra, P ;
Longo, A ;
Ruggirello, A ;
Liveri, VT .
JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (24) :8260-8268
[7]   Determination of integrated intensities of overlapped IR bands by curve-fitting, Fourier self-deconvolution and a combination of both methods [J].
Czarnecki, MA ;
Ozaki, Y .
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 1996, 52 (12) :1593-1601
[8]   WATER-STRUCTURE IN WATER AOT N-HEPTANE MICROEMULSIONS BY FT-IR SPECTROSCOPY [J].
GIAMMONA, G ;
GOFFREDI, F ;
LIVERI, VT ;
VASSALLO, G .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1992, 154 (02) :411-415
[9]   Effect of the addition of water-soluble polymers on the structure of aerosol OT water-in-oil microemulsions: A Fourier transform infrared spectroscopy study [J].
GonzalezBlanco, C ;
Rodriguez, LJ ;
Velazquez, MM .
LANGMUIR, 1997, 13 (07) :1938-1945
[10]   ENTHALPIC STUDIES ON THE STATE OF WATER IN SODIUM BIS(2-ETHYLHEXYL)SULFOSUCCINATE REVERSED MICELLES [J].
GOTO, A ;
HARADA, S ;
FUJITA, T ;
MIWA, Y ;
YOSHIOKA, H ;
KISHIMOTO, H .
LANGMUIR, 1993, 9 (01) :86-89