Synthesis and Aggregation of Amphiphilic Porphyrin-Perylenebisimide Dyads.

We report the straightforward synthesis of a family of amphiphilic zinc-porphyrin-perylenebisimide (PBI) dyads containing sterically demanding substituents at the porphyrin meso-position, as well as at the PBI bay-position. The hydrophilic head group consists of oligo-carboxylic acid G2-Newkome dendrons attached to the porphyrin, whereas lipophilic pentyl-hexyl-swallowtails are connected to the PBI imide position. Using UV/Vis absorption and fluorescence emission spectroscopy, their tetrahydrofuran (THF) initiated disaggregation was studied in aqueous media.

Exfoliation of Graphene by Dendritic Water-Soluble Zinc Phthalocyanine Amphiphiles in Polar Media.

Two zinc phthalocyanines (ZnPcs) have been equipped with Newkome-type dendritic branches of increasing size and number of terminal carboxylate functional groups. The negatively charged carboxylates render these polyelectrolytes soluble in polar media such as methanol or buffered water. Sonication of the ZnPcs with graphene allowed for pronounced non-covalent binding of the ZnPc moieties on the graphene surface.