de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Reorientation phenomena in imidazolium methyl sulfonate as probed by advanced solid-state NMR

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons47876

Fischbach,  I.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48786

Spiess,  Hans Wolfgang
MPI for Polymer Research, Max Planck Society;

Locator
There are no locators available
Fulltext (public)
There are no public fulltexts available
Supplementary Material (public)
There is no public supplementary material available
Citation

Goward, G. R., Saalwächter, K., Fischbach, I., & Spiess, H. W. (2003). Reorientation phenomena in imidazolium methyl sulfonate as probed by advanced solid-state NMR. Solid State Nuclear Magnetic Resonance, 24(2-3), 150-162.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-632A-1
Abstract
Evidence for reorientation of imidazolium rings in imidazolium methylsulfonate is demonstrated using solid-state NMR. This material is a model system for exciting new proton-conducting materials based on imidazole. Two advanced NMR methods, including 1H–13C and 1H–15N recoupled polarization transfer with dipolar sideband pattern analysis and analysis of the coalescence of 13C lineshapes are used to characterize the ring reorientation. The process is found to occur at temperatures well below the melting point of the salt, between 240 and 380 K, and is described by a single activation energy, of 38±5 kJ/mol. This material is considered as a model system for quantifying the ring reorientation process, which is often proposed to be the rate-limiting step in proton transport in imidazole-based proton conducting materials.