Stiff PEGs: Aqueous solutions of pyrene end-capped poly(ethylene glycol)s (PEGs) increase their viscosity in the presence of octafluoronaphthalene possibly as a result of aggregation by face-to-face stacking (shown schematically). The exploitation of the arene–perfluoroarene supramolecular synthon in solution is reported.
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Kilbinger et al. (2002) studied this question.
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