Cadmium sulfide (CdS) particles have been in situ generated in surfactant vesicles prepared from dihexadecyl phosphate (DHP). Absorption and emission spectra indicated the diameters of CdS particles to be 2.5-5.0 nm. Fluorescence decays of CdS particles in DHP vesicles have been found to be multiexponential and unaffected by the incorporation of cetylviologen cations, C16MV2+. Conversely, fluorescence intensities have been observed to decrease upon the addition of C16MV2+, indicating the predominance of static quenching in photoelectron transfer in DHP vesicles. Photoelectron transfer has been observed by monitoring the development of C16MV•+ upon the band gap irradiation of CdS particles, confined in the inner bilayers of DHP vesicles, in the presence of benzyl alcohol as a sacrificial electron donor. Transmembrane photoelectron transfer has been demonstrated in dissymmetrical DHP vesicles which contained size-quantized CdS particles in their inner bilayers, C16MV2+ in their inner and outer bilayers, and Ag+ on their outer surfaces. Band gap irradiation in the presence of benzyl alcohol has resulted in the reduction of Ag+ on the DHP vesicle outer surface.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry