Vibrational mode behavior of SDS aqueous solutions studied by Raman scattering
Aqueous solutions of sodium dodecyl sulfate with concentrations between 12.6 and 100% of SDS are studied by Raman scattering. Raman spectrum behavior is followed vs. temperature, and a phase transition is observed for all samples. The authors focus their study mainly on the intensity variations of both the symmetrical and antisymmetrical vibrational modes of CH/sub 2/ groups situated in the region 2800-3000 cm/sup -1/ and on skeletal vibrations (C-C binding) in the region 1050-1150 cm/sup -1/. The study of the high-frequency part of the spectrum showed the characteristics of an order-disorder transition already studied on other materials. Apparently, the skeletal vibrational spectrum shows an unusual behavior, but polarization experiments help us to solve this difficulty. The authors show that the C-C antisymmetrical stretching mode is perturbed by a SO/sub 3/ symmetrical stretching mode appearing in the micellar phase. Concentrations of SDS between cmc and 62% can have two low-temperature phases, depending on the cooling procedure. One of these phases could be the so-called gel phase. 34 references, 15 figures, 1 table.
- Research Organization:
- Universite Rene Descartes, Paris, France
- OSTI ID:
- 6012982
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:2; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Resonance Raman and molecular orbital studies of the effects of deuteration on the vibrational structure of the p-benzosemiquinone radical anion
Related Subjects
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALI METAL COMPOUNDS
AQUEOUS SOLUTIONS
DATA
DISPERSIONS
ENERGY LEVELS
ESTERS
EXCITED STATES
EXPERIMENTAL DATA
INFORMATION
LASER SPECTROSCOPY
LOW TEMPERATURE
MIXTURES
NORMAL-MODE ANALYSIS
NUMERICAL DATA
ORGANIC COMPOUNDS
QUANTITY RATIO
RAMAN SPECTROSCOPY
SODIUM COMPOUNDS
SOLUTIONS
SPECTROSCOPY
SULFURIC ACID ESTERS
VIBRATIONAL STATES