Dynamics of photoinduced charge separation on the surface of dihexydecylphosphate vesicles

Article Abstract:

A study was conducted to analyze the dynamics of photoinduced charge separation on the surface of dihexydecylphosphate vesicles. N-Alkyl-4-cyanopyridinium ions were prepared from 4-cyanopyridine and an alkyl halide. Laser flash photolysis was carried out to determine the absorption spectra and decay kinetics of reaction intermediates. Results indicated that the photoexcitation of the complete system accommodated a reduction of entrapped Co(bpy)3(super 3+) to Co(bpy)3(super 2+).

Surface chemistry, Electrons

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N-alkylcyanopyridinium-mediated photoinduced charge separation across dihexadecyl phosphate vesicle membranes

Article Abstract:

A study was conducted to analyze N-alkyl-4-cyanopyridinium-mediated photoinduced charge separation across dihexadecyl phosphate vesicle membranes. 4-Cyanopyridine was purified by ethanol-based recrystallization. A 1.5 kW xenon lamp was utilized to carry out continuous photolysis. Experimental results indicated net photoinduced transmembrane reductions in vectorially structured systems supporting oxidants within the inner aqueous phase of the vesicles.

Phosphates, Membranes (Technology)

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Photophysical deactivation dynamics of excited porphyrin molecules adsorbed onto dihexadecyl phosphate vesicles

Article Abstract:

The triplet-triplet annihilation reactions of meso-tetra(N-methyl-4-pyridyl)porphine cations on the anionic surfaces of dihexadecyl phophate in small unilamellar surface are studied. It is shown that the diffusion coefficient undergoes a discontinuous change at the major phase-transition temperature of the vesicles, demonstrating Arrhenius activation energies of 31 kJ/mol under 62 degrees centigrade and 7.9 kJ/mol over 62 degrees Centigrade.

Molecular dynamics, Porphyrins

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