Redox-Responsive ReverseVesicles Self-Assembled byPseudo[2]rotaxanes for Tunable Dye Release.

Reverse vesicles exhibiting functions similar to thoseof normalvesicles have been constructed through the self-assembly of TTF/CBPQT4+-based pseudo[2]rotaxanes in a nonpolar solvent. The endsof the threads of the pseudo[2]rotaxanes are attached with a Fréchet-typeG-3 dendron and a hydrogen-bonded arylamide foldamer. These vesiclesexhibit a response to redox. By exploiting the dynamic featurespontaneouslyslow disassociation of the pseudorotaxanesthe sustained releaseof dyes embedded in the reverse vesicles has been demonstrated, whichcan be further tuned by changing the solvent polarity. [ABSTRACT FROM AUTHOR]