Electron spin resonances and electron spin echo modulation studies of N,N,N',N'-tetramethylbenzidine photoionization in anionic micelles: structural effects of tetramethylammonium cation counterion substitution for sodium cation in dodecyl sulfate micelles

Journal Article · Wed Aug 22 00:00:00 EDT 1984 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00329a005· OSTI ID:6319127

Szajdzinska-Pietek, E; Maldonado, R; Kevan, L; Jones, R R.M.

Comparative electron spin resonance and electron spin echo modulation studies have been carried out for the radical cation produced by photoionization of N,N,N'N'-tetramethylbenzidine in micellar sodium dodecyl sulfate (SDS) and tetramethylammonium dodecyl sulfate (TMADS) solutions. The substitution of tetramethylammonium ion for sodium ion brings about a marked increase in photoionization efficiency at 77K which correlates with increased photoproduced cation-water interactions as determined by electron spin echo modulation (ESEM) experiments. ESEM experiments have also been performed for a series of x-doxylstearic acids as paramagnetic probes in both micellar solutions. The data indicate more water penetration in TMADS than SDS micelles. The results have been explained in terms of a decrease in the compactness of the micelle polar head-group region and increased surface roughness by the substitution of the more hydrophobic tetramethylammonium cation for sodium cation. 18 references, 6 figures.

• Research Organization: Univ. of Houston, TX
• OSTI ID: 6319127
• Journal Information: J. Am. Chem. Soc.; (United States), Vol. 106:17
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AMINES
EXCITATION
STRUCTURAL CHEMICAL ANALYSIS
ACOUSTIC ESR
ANIONS
CARBOXYLIC ACIDS
CATIONS
CORRELATIONS
DATA ANALYSIS
EFFICIENCY
EXPERIMENTAL DATA
LOW TEMPERATURE
MICELLAR SYSTEMS
PHOTOIONIZATION
PHOTOLYSIS
QUATERNARY COMPOUNDS
SODIUM COMPOUNDS
SULFURIC ACID ESTERS
WATER
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
CHARGED PARTICLES
CHEMICAL REACTIONS
DATA
DECOMPOSITION
ELECTRON SPIN RESONANCE
ENERGY-LEVEL TRANSITIONS
ESTERS
HYDROGEN COMPOUNDS
INFORMATION
IONIZATION
IONS
MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
RESONANCE
400500* - Photochemistry