Electron spin resonance, electron spin echo modulation, and electron nuclear double resonance studies on the photolysis of positively and negatively charged alkylphenothiazines in anionic aerosol dioctyl and cationic cetyltrimethylammonium bromide/hexanol reverse micelles
- Univ. of Houston, TX (United States)
Photoionization of solubilized molecules in organized molecular assemblies has been used as model systems for light energy storage. In this article, positively charged (phenothiazinylalkyl)trimethylammonium bromides (PC[sub n]/TAB, n = 4, 6, 9, 12) and negatively charged sodium alkylphenothiazinesulfonates (PC[sub n]/S, n = 3, 6, 9, 12) incorporated into anionic aerosol dioctyl (AOT) and cationic cetylrimethylammonium bromide (CTAB)/hexanol reverse micelles have been photoionized at 77 K. The photoproduced radicals that are identified as the alkylphenothiazine radical cations are quantitated by electron spin resonance spectroscopy. The photoyield decreases monotonically with increasing interior water pool size ([omega][sub 0]) in anionic AOT reverse micelles and correlates with an increasingly negative interface charge of AOT due to increasing hydration of Na[sup +] conterions. The decrease correlates with a greater distance for electron transfer electron with increasing [omega][sub 0] as shown by the deuteron ESEM results. 48 refs., 13 figs.
- OSTI ID:
- 5833288
- Journal Information:
- Langmuir; (United States), Journal Name: Langmuir; (United States) Vol. 9:7; ISSN LANGD5; ISSN 0743-7463
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250000 -- Energy Storage
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400500* -- Photochemistry
ACOUSTIC ESR
ALCOHOLS
AZINES
CHEMICAL REACTIONS
DECOMPOSITION
ELECTRON SPIN RESONANCE
ENERGY STORAGE
HETEROCYCLIC COMPOUNDS
HEXANOLS
HYDROXY COMPOUNDS
IONIZATION
MAGNETIC RESONANCE
MICELLAR SYSTEMS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHENOTHIAZINES
PHOTOCHEMICAL ENERGY STORAGE
PHOTOCHEMICAL REACTIONS
PHOTOIONIZATION
PHOTOLYSIS
RESONANCE
STORAGE
SURFACTANTS