Catalytic activity of macroion-porphyrin nanoassemblies.
A new type of catalytically active self-assembled nanostructures in aqueous solution is presented. Polyelectrolyte-porphyrin nanoscale assemblies consisting of anionic cylindrical poly(styrene sulfonate) brush molecules and cationic tetravalent meso-tetrakis(4-N-methyl-pyridinium)porphyrin (TMPyP) or meso-tetrakis(4-(trimethyl-ammonium)phenyl)-porphyrin (TAPP), respectively, exhibit up to 8-fold higher catalytic activity with regard to light induced iodide oxidation than the corresponding porphyrins without polymeric template. This is particularly interesting because a general concept rather than a specific binding motif is exploited. The approach introduced here hence is attractive due to its facility and versatility and bears potential, for example, in light harvesting and energy conversion.
Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, D-91058 Erlangen, Germany.
Sabine
S
Frühbeißer
Franziska
F
Gröhn