Chain-end-functionalized polyphosphazenes via a one-pot phosphine-mediated living polymerization.
A simple polymerization of trichlorophosphoranimine (Cl3 P = N-SiMe3 ) mediated by functionalized triphenylphosphines is presented. In situ initiator formation and the subsequent polymerization progress are investigated by (31) P NMR spectroscopy, demonstrating a living cationic polymerization mechanism. The polymer chain lengths and molecular weights of the resulting substituted poly(organo)phosphazenes are further studied by (1) H NMR spectroscopy and size exclusion chromatography. This strategy facilitates the preparation of polyphosphazenes with controlled molecular weights and specific functional groups at the α-chain end. Such well-defined, mono-end-functionalized polymers have great potential use in bioconjugation, surface modification, and as building blocks for complex macromolecular constructs.
Institute of Polymer Chemistry, Johannes Kepler University Linz, Welser Straße 42, Leonding, A-4060, Austria.
Sandra
S
Wilfert
Helena
H
Henke
Wolfgang
W
Schoefberger
Oliver
O
Brüggemann
Ian
I
Teasdale
D002850:Chromatography, Gel; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009943:Organophosphorus Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010720:Phosphines / Q000737:chemistry*; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D012015:Reference Standards
D009943:Organophosphorus Compounds; D010720:Phosphines; D011108:Polymers; C108974:poly(phosphazene); C044646:phosphine
cationic living polymerization; chain-end functionality; functional polymers; polyphosphazenes