TY - JOUR A1 - Ruthard, C. A1 - Maskos, Michael A1 - Kolb, U. A1 - Gröhn, F. T1 - Polystyrene sulfonate - porphyrin assemblies: influence of polyelectrolyte and porphyrin structure T2 - The journal of physical chemistry / B N2 - In this study, electrostatic self-assembly of different polystyrene sulfonates and a set of tetravalent cationic porphyrins is investigated. It is shown that association of linear polystyrene sulfonates of different molar masses yields finite size nanoscale assemblies that are stable in aqueous solution. Aggregates are compared to the ones of cylindrical brushes, revealing that both form assemblies in the 100 nm range with the charge ratio (molar ratio of porphyrin charges to polyelectrolyte charges) being determining, while the morphology of the resulting network-like assemblies is different for both polyelectrolyte architectures. For the smallest 8k polystyrene sulfonate, in addition, stoichiometric conditions differ. The influence of the molecular porphyrin structure was investigated by comparing meso-tetrakis(4-(trimethyl-ammonium)phenyl)porphyrin (TAPP) with its Cu(II) and Zn(II) loaded analogues and meso-tetrakis(4-N-methylpyridinium)porphyrin (TMPyP), revealing differences in stacking tendency and geometry. Additionally, the TMPyP accumulates more in the inside of the brush than the other porphyrins, likely due to the different position of its charged groups. The supramolecular nanostructures formed were characterized by UV–vis spectroscopy, light scattering, atomic force microscopy, cryo transmission electron microscopy, and small-angle neutron scattering. Results may build a valuable basis for the use of polyelectrolyte–porphyrin assemblies in medicine, catalysis, or energy conversion. PB - Soc. CY - Washington, DC KW - Polyelectrolyte KW - Porphyrin KW - Self-assembly KW - Supramolecular nanostructures PY - 2011 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/25424 AN - OPUS4-25424 SN - 1520-6106 SN - 1520-5207 SN - 1089-5647 VL - 115 IS - 19 SP - 5716 EP - 5729 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany