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Effects of added tetramethylammonium chloride on sodium dodecyl sulfate micellar structure: electron scavenging ability of doxylstearic acid spin probes and their reaction with N,N,N'N'-tetramethylbenzidine photogenerated cations studied by electron spin resonance

Journal Article · · J. Phys. Chem.; (United States)
DOI:https://doi.org/10.1021/j100405a011· OSTI ID:5456208
;
Electron spin resonance (ESR) studies are carried out for a series of chi-doxylstearic acids (chi = 5, 7, 10, 12, and 16) and photoproduced N,N,N'N'-tetramethylbenzidine (TMB) cations in sodium dodecyl sulfate micelles in order to investigate the effects of added tetramethylammonium chloride (TMACl) on the micellar structure at room temperature. It is observed that chi-doxylstearic acids not only act as electron acceptors for electrons produced by photoionization of TMB but also react with TMB cations to produce nonparamagnetic products. chi-Dependences of the reactivities of these two reactions suggest that chi-doxylstearic acids increase their average number of gauche conformations inside the micelles when TMACl is added to the micellar solution. It is concluded that tetramethylammonium cations act as spacers between head groups of surfactant molecules to become more disordered and loosely packed inside the micelles. This confirms previous electron spin echo modulation studies on frozen micellar solutions.
Research Organization:
Univ. of Houston, TX
DOE Contract Number:
AS05-80ER10745
OSTI ID:
5456208
Journal Information:
J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:14; ISSN JPCHA
Country of Publication:
United States
Language:
English

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Related Subjects

14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AMMONIUM CHLORIDES
AMMONIUM COMPOUNDS
AMMONIUM HALIDES
CATIONS
CHARGED PARTICLES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
DATA
ELECTRON SPIN RESONANCE
ELECTRON TRANSFER
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
INFORMATION
IONS
MAGNETIC RESONANCE
MEDIUM TEMPERATURE
MICELLAR SYSTEMS
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
RESONANCE