Synthesis,characterization, and micellization studies of coil‐rod‐coil and ABA ruthenium(II) terpyridine assemblies with π‐conjugated electron acceptor systems |
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| Authors: | Florian Schlütter Georges M Pavlov Jean‐François Gohy Andreas Winter Andreas Wild Martin D Hager Stephanie Hoeppener Ulrich S Schubert |
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| Institution: | 1. Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich‐Schiller‐University Jena, Humboldtstr. 10, 07743 Jena, Germany;2. Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands;3. Unité CMAT, Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvian‐la‐Neuve, Belgium |
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| Abstract: | A series of RuII heterodinuclear complexes of ABA ‐type with electron‐deficient bis‐terpyridines as building blocks was synthesized by (R‐tpy)RuIIICl3 complexation. These compounds were characterized by NMR spectroscopy, MALDI‐TOF, ESI‐TOF mass spectrometry, and elemental analysis. The results were compared with a coil‐rod‐coil RuII metallo‐supramolecular copolymer, which was synthesized by bis‐complex formation between a hydrophilic ω‐terpyridine poly(ethylene glycol) RuII mono‐complex and a hydrophobic bis‐terpyridine‐functionalized rigid core. This amphiphilic RuII triblock copolymer showed self‐assembly to clusters and micelles in aqueous solution, which was studied by transmission electron microscopy and dynamic light scattering. Applying velocity sedimentation experiments the number of amphiphilic RuII ABA triblock copolymer molecules within the micelles could be estimated. Finally, the photophysical properties of the RuII supramolecular assemblies were investigated by UV–vis spectroscopy. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011 |
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| Keywords: | dynamic light scattering micelles supramolecular structures TEM ultracentrifugation |
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