Photoionization of N,N,N',N'-tetramethylbenzidine in anionic-cationic mixed micelles of sodium dodecyl sulfate-dodecyltrimethylammonium chloride: electron spin resonance and electron spin echo modulation studies

Journal Article · Thu May 05 00:00:00 EDT 1988 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100320a043· OSTI ID:6925993

Rivara-Minten, E; Baglioni, P; Kevan, L

Electron spin echo modulation (ESEM) and electron spin resonance (ESR) spectra of the photogenerated N,N,N',N'-tetramethylbenzidine cation radical (TMB/sup +/) in frozen mixed micelles of dodecyltrimethylammonium chloride (DTAC) and sodium dodecyl sulfate (SDS) have been studied as a function of the mixed micelle composition. ESEM effects due to TMB/sup +/ interactions with deuterium in D/sub 2/O show a decrease of the TMB/sup +/-water interaction that depends on the SDS-DTAC mixed micelle composition and reaches a minimum for the equimolar mixed micelle. The efficiency of charge separation upon photoionization of TMB to produce TMB/sup +/ measured by ESR correlates with the degree of water penetration into the micelle. ESEM effects due to interaction of x-doxylstearic acid nitroxide probes with deuterium in D/sub 2/O show that the decrease of water penetration is due to higher surface packing due to electrostatic attraction among the polar headgroups of the two surfactants.

• Research Organization: Univ. of Houston, TX (USA)
• OSTI ID: 6925993
• Journal Information: J. Phys. Chem.; (United States), Vol. 92:9
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BENZIDINE
PHOTOIONIZATION
ACOUSTIC ESR
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
MICELLAR SYSTEMS
ORGANIC CHLORINE COMPOUNDS
ORGANIC SULFUR COMPOUNDS
SODIUM COMPOUNDS
ALKALI METAL COMPOUNDS
AMINES
AROMATICS
DATA
INFORMATION
IONIZATION
MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
RESONANCE
400500* - Photochemistry