Herein, we demonstrate the synthesis of chain-end functionalized poly(ferrocenyldimethylsilane) (PFDMS) and poly(2-alkyl-2-oxazoline)s (POx) of different molar mass, and the subsequent macromolecular conjugation to organometallic PFDMS-b-POx block copolymers of different composition via copper-catalyzed azide-alkyne cycloaddition. We distinguish between amphiphilic crystalline-coil PFDMS-b-PEtOx (poly(2-ethyl-2-oxazoline)) and double crystalline PFDMS-b-PiPrOx (poly(2-iso-propyl-2-oxazoline) materials. After characterization of the obtained block copolymers via SEC, NMR, FT-IR and X-ray scattering, the solution behavior in a selective solvent for PFDMS (e.g. acetone) was investigated. We found various aggregate morphologies (sheets, vesicles, rods), depending on the weight fraction of the organometallic PFDMS segment. For two selected PFDMS-b-PiPrOx compositions, hierarchical self-assembly by a two-step protocol could be realized: first, cylindrical micelles with a PFDMS core were found in acetone, followed by the transfer into water and, finally, crystallization of the PiPrOx segment upon heating and the formation of anisotropic superstructures.

Synthesis and hierarchical self-assembly of amphiphilic poly(ferrocenyldimethylsilane)-<i>block</i>-poly(2-alkyl-2-oxazoline) block copolymers in organic and aqueous media

247th National Meeting (2014)

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Synthesis and hierarchical self-assembly of amphiphilic poly(ferrocenyldimethylsilane)-block-poly(2-alkyl-2-oxazoline) block copolymers in organic and aqueous media