Photoinduced electron transfer from (alkoxyphenyl)triphenylporphyrins to interface water of dihexadecyl phosphate, dipalmitoylphosphatidylcholine, and dioctadecyldimethylammonium chloride vesicles

Journal Article · Thu Apr 21 04:00:00 EDT 1994 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100067a029· OSTI ID:7165891

Kang, Y S; Kevan, L ^[1]

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1. Univ. of Houston, TX (United States)

Photoionization of (alkoxyphenyl)triphenylporphyrins (C[sub n]OPTPP) in dihexadecyl phosphate (DHP), dipalmitoylphosphatidylcholine (DPPC), and dioctadecyldimethylammonium chloride (DODAC) frozen vesicle solutions at 77 K occurs via electron transfer from C[sub n]OPTPP to bulk water at the interface of the vesicles. This process results in C[sub n]OPTPP[sup +] formation which is characterized and quantitated by electron spin resonance. The cation yield decreases with increasing C[sub n] alkyl chain length of C[sub n]OPTPP due to an increasing interaction distance between the porphyrin headgroup and interface water. This change in interaction distance is directly measured with electron spin echo modulation by measuring the deuterium modulation depth associated with C[sub n]OPTPP[sup +] interactions with deuterated water at the interface. The cation yield also decreases from cationic DODAC to neutral DPPC to anionic DHP vesicles because of a charge effect on electron transfer through the interface. 37 refs., 5 figs.

• OSTI ID: 7165891
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 98:16; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400500 -- Photochemistry
ACOUSTIC ESR
AMINES
AMMONIUM COMPOUNDS
ANIONS
AQUEOUS SOLUTIONS
CARBOXYLIC ACIDS
CATIONS
CHARGED PARTICLES
CONVERSION
DISPERSIONS
ELECTRON SPIN RESONANCE
ELECTRON TRANSFER
ENERGY CONVERSION
ESTERS
FREEZING
HEAVY WATER
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INTERFACES
IONIZATION
IONS
LECITHINS
LIPIDS
MAGNETIC RESONANCE
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHOLIPIDS
PHOSPHORIC ACID ESTERS
PHOTOIONIZATION
PORPHYRINS
QUATERNARY COMPOUNDS
RADIATION EFFECTS
RESONANCE
SOLAR ENERGY CONVERSION
SOLUTIONS
SURFACTANTS
SYNTHESIS
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
WATER