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Chain-end-functionalized polyphosphazenes via a one-pot phosphine-mediated living polymerization.

ABSTRACT: 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.

SUBMITTER: Wilfert S

PROVIDER: S-EPMC4115175 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature

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Chain-end-functionalized polyphosphazenes via a one-pot phosphine-mediated living polymerization.

Wilfert Sandra S Henke Helena H Schoefberger Wolfgang W Brüggemann Oliver O Teasdale Ian I

Macromolecular rapid communications 20140404 12

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 strate ...[more]

PMID: 24700544

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