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Chain-End-Functionalized Polyphosphazenes via a One-Pot Phosphine-Mediated Living Polymerization

A simple polymerization of trichlorophosphoranimine (Cl(3)P = N−SiMe(3)) 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 mech...

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Detalles Bibliográficos
Autores principales: Wilfert, Sandra, Henke, Helena, Schoefberger, Wolfgang, Brüggemann, Oliver, Teasdale, Ian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BlackWell Publishing Ltd 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4115175/
https://www.ncbi.nlm.nih.gov/pubmed/24700544
http://dx.doi.org/10.1002/marc.201400114
Descripción
Sumario:A simple polymerization of trichlorophosphoranimine (Cl(3)P = N−SiMe(3)) 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. [Image: see text]