Original title: LC-NMR Analysis of Phenylsilane Polymers
Authors: Pinkas, Jiří ; Merna, J. ; Sýkora, Jan
Document type: Papers
Conference/Event: Symposium on Catalysis /43./, Prague (CZ), 2011-11-07 / 2011-11-08
Year: 2011
Language: eng
Abstract: We report the analysis of dehydrocoupling polymerization reactions of phenylsilane via on-flow LC-NMR experiment. The successful separation was achieved by isocratic elution of acetonitrile and aceton (80:20). The separation was solely monitored by 1H NMR detection. The properties of the polymeric product depend on the catalytical system. The products can differ in the molar weight distribution, degree of branching and amount of cyclic and rearranged products. In our particular cases, the weight average molar mass (Mw) varies from several silane units up to 4100 g.mol-1. The branching of polysilanes is monitored by 29Si{1H} INEPT experiment with the polarization transfer from the ortho hydrogen (J~7 Hz). The connectivity within branched unit was established via 1H à 29Si-29Si INEPT-INADEQUATE experiment.
Keywords: 29Si NMR; LC-NMR; phenylsilanes
Project no.: CEZ:AV0Z40720504 (CEP), CEZ:AV0Z40400503 (CEP), GA203/09/1574 (CEP), IAA400720706 (CEP)
Funding provider: GA ČR, GA AV ČR
Host item entry: Program Book of Abstracts, ISBN 978-80-87351-15-4

Institution: Institute of Chemical Process Fundamentals AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0204539

Permalink: http://www.nusl.cz/ntk/nusl-81051


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