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Probing Proton Mobility in Polyvinazene and its Sulfonated Derivatives Using 1 H Solid‐State NMR
Author(s) -
Ye Gang,
FortierMcGill Blythe,
Traer Jason W.,
Czardybon Agata,
Goward Gillian R.
Publication year - 2007
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200700203
Subject(s) - proton , homonuclear molecule , chemistry , sulfonic acid , activation energy , proton nmr , solid state nuclear magnetic resonance , solid state , polymer chemistry , nuclear magnetic resonance , stereochemistry , physics , organic chemistry , molecule , nuclear physics
The proton dynamics of PV and its sulfonated derivatives have been studied using high‐resolution solid state 1 H MAS NMR. Variable temperature experiments were used to determine the activation energy for transportation of hydrogen bonded protons, found to be 22 ± 1 kJ · mol −1 for PV and 13 ± 1 kJ · mol −1 for PV–B25. The proton exchange between sulfonic acid group and vinazene ring observed from both variable temperature experiments and 1 H EXSY NMR experiments provides a good explanation for this difference. A rotor‐synchronized homonuclear double quantum filter sequence was used to distinguish protons of differing mobilities. A model is proposed to understand the distinct proton mobilities in these materials.