A metallo-supramolecular ABC triblock copolymer containing a bis(2,2‘:6‘,2‘ ‘-terpyridine)ruthenium(II) complex as a supramolecular connection between the constituting poly(styrene)- block -poly(2-vinylpyridine) diblock and poly(ethylene oxide) block (PS 32 - b -P2VP 13 -[Ru]-PEO 70 ) has been prepared. This copolymer was further utilized in order to prepare aqueous micelles consisting of a PS core, a pH-sensitive P2VP shell, and a PEO corona. The accordingly formed micelles have been characterized by a combination of dynamic light scattering, transmission electron microscopy, and atomic force microscopy. Spherical micelles and a minor fraction of bigger aggregates were observed by these three independent techniques. The pH sensitivity of the P2VP shell could be demonstrated and the reversibility of the metallo-supramolecular complex investigated utilizing a strong competitive ligand.
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Gohy et al. (2002) studied this question.
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