8 research outputs found
EPR study of positive holes on phenylene vinylene chains:from dimer to polymer
No full textIsolated radical cations of substituted oligomers and polymers of phenylene vinylenes (PV) produced by irradiation in glassy toluene solutions were characterized by EPR. It was shown that the linewidth of the EPR signal from radical cations in oligomers decreased with increasing the number of repeat PV units, at least, up to n = 8. This result implies extensive delocalization of hole on the isolated PV chain. In the case of polymer (MEH-PPV), the EPR signal linewidth is substantially smaller than the extrapolated value for oligomer radical cations, which was tentatively explained by the effect of substitution pattern. (C) 2004 Elsevier B.V. All rights reserved
Effect of the type of reducing agents of silver ions in interpolyelectrolyte-metal complexes on the structure, morphology and properties of silver-containing nanocomposites
No full textPreparation and characterization of Cu/Cu2O-containing nanocomposites based on interpolyelectrolyte complexes of pectin–polyethyleneimine
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