TY  - JOUR
AU  - Frühbeißer, Sabine
AU  - Mariani, Giacomo
AU  - Gröhn, Franziska
TI  - Porphyrin Diacid-Polyelectrolyte Assemblies: Effective Photocatalysts in Solution
JO  - Polymers
VL  - 8
IS  - 5
SN  - 2073-4360
CY  - Basel
PB  - MDPI
M1  - FZJ-2016-05280
SP  - 180 -198
PY  - 2016
AB  - Developing effective and versatile photocatalytic systems is of great potential in solar energy conversion. Here we investigate the formation of supramolecular catalysts by electrostatic self-assembly in aqueous solution: Combining positively charged porphyrins with negatively charged polyelectrolytes leads to nanoscale assemblies where, next to electrostatic interactions, π–π interactions also play an important role. Porphyrin diacid-polyelectrolyte assemblies exhibit a substantially enhanced catalytic activity for the light-driven oxidation of iodide. Aggregates with the hexavalent cationic porphyrin diacids show up to 22 times higher catalytic activity than the corresponding aggregates under neutral conditions. The catalytic activity can be increased by increasing the valency of the porphyrin and by choice of the loading ratio. The structural investigation of the supramolecular catalysts took place via atomic force microscopy and small angle neutron scattering. Hence, a new facile concept for the design of efficient and tunable self-assembled photocatalysts is presented.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000377795200020
DO  - DOI:10.3390/polym8050180
UR  - https://juser.fz-juelich.de/record/819673
ER  -