Infrared Spectroscopy of Anionic, Cationic, and Zwitterionic Surfactants
Joint Authors
da Silva, Albérico B. F.
Pimentel, André Silva
Viana, Rommel B.
Source
Advances in Physical Chemistry
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-06-12
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
This paper describes the ordering degree of anionic, cationic, and zwitterionic surfactants with the increase of their packing density on Ge substrate by using Fourier transform infrared-attenuated total reflection (FTIR-ATR) spectroscopy.
This work shows new insights on the conformational order of sodium dodecyl sulfate (SDS), N-hexadecyl-N-N-dimethyl-3-ammonio-1-propane-sulfonate (HPS), hexadecyl-trimethylammonium bromide (CTAB), and dodecyl trimethylammonium bromide (DTAB).
DFT and semiempirical calculations are also performed in order to evaluate the effect of headgroup hydration and counterion.
The CH2 asymmetric and symmetric stretching bands for the SDS molecule show a shift of 1.7 and 0.9 cm−1 to higher frequencies as the packing density increases, while it is observed a shift of 2.6 and 2.7 cm−1 for the HPS molecule, respectively.
The DTAB molecule shows a shift of 4.5 cm−1 to lower frequencies for both CH2 asymmetric and symmetric stretching bands as the packing density increases, indicating the decrease of gauche conformations and the increase of all-trans conformations over the aliphatic chain.
American Psychological Association (APA)
Viana, Rommel B.& da Silva, Albérico B. F.& Pimentel, André Silva. 2012. Infrared Spectroscopy of Anionic, Cationic, and Zwitterionic Surfactants. Advances in Physical Chemistry،Vol. 2012, no. 2012, pp.1-14.
https://search.emarefa.net/detail/BIM-506722
Modern Language Association (MLA)
Viana, Rommel B.…[et al.]. Infrared Spectroscopy of Anionic, Cationic, and Zwitterionic Surfactants. Advances in Physical Chemistry No. 2012 (2012), pp.1-14.
https://search.emarefa.net/detail/BIM-506722
American Medical Association (AMA)
Viana, Rommel B.& da Silva, Albérico B. F.& Pimentel, André Silva. Infrared Spectroscopy of Anionic, Cationic, and Zwitterionic Surfactants. Advances in Physical Chemistry. 2012. Vol. 2012, no. 2012, pp.1-14.
https://search.emarefa.net/detail/BIM-506722
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-506722