Terpyridines as supramolecular initiators for living polymerization methods |
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Authors: | Marcel Heller Ulrich S. Schubert |
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Affiliation: | 1. Lehrstuhl für Makromolekulare Stoffe, Technische Universität München, Lichtenbergstr. 4, 85747 Garching (Germany);2. Center for NanoScience, Ludwig-Maximilians-Universität, Geschwister-Scholl-Platz 1, 80539 München, (Germany) Laboratory of Macromolecular and Organic Chemistry (SMO), Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven (The Netherlands) |
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Abstract: | Bis(5,5″-bis(bromomethyl)-2,2′:6′,2″-terpyridine), bis-4′-(4-bromomethylphenyl)-2,2′:6′,2″-terpyridine and 4-hydroxymethyl-5′,5″-dimethyl-2,2′:6′,2″-terpyridine metal complexes have been used as initiators for the living polymerization of 2-oxazolines and L-lactides. In both cases polymers with controlled molecular weights and narrow molecular weight distributions have been obtained. In-line diode array GPC measurements of iron(II) complexed poly(ethyloxazoline)s showed an unexpected absence of fragmentation. Viscosity experiments demonstrated the differences of the complexed and uncomplexed systems. |
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