Abstract
In this study, the self-assembly of ionic porphyrins and polyelectrolytes in dependence on the polyelectrolyte architecture and molecular mass is investigated systematically. The systems consist of tetravalent anionic meso-tetrakis(4-sulfonatophenyl)-porphyrin (TPPS), which is combined with different positively charged macroions: poly(amidoamine) dendrimer of generation 4, linear polylysine of different molecular masses, poly(diallyldimethylammonium chloride), and a cylindrical poly-l-lysine brush. Light scattering reveals defined supramolecular assemblies with hydrodynamic radii between RH = 30 nm and RH = 180 nm. Further, size and shape of TPPS–polyelectrolyte assemblies are substantially affected by the polyelectrolyte architecture but less by the molecular mass of the polyelectrolyte. ζ-potential measurements detect an assembly charge corresponding to the excess component that is responsible for the aggregate being stable in solution.
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