¹H Solid-State NMR Investigation of Structure and Dynamics of Anhydrous Proton Conducting Triazole-Functionalized Siloxane Polymers

Authors

Ümit Akbey, Max Planck Institute for Polymer Research
Sergio Granados-Focil, Clark UniversityFollow
E. Bryan Coughlin, University of Massachusetts Amherst
Robert Graf, Max Planck Institute for Polymer Research
Hans Wolfgang Spiess, Max Planck Institute for Polymer Research

Document Type

Article

Abstract

1H MAS solid-state NMR methods are applied to elucidate the conduction mechanism of an anhydrous proton conducting triazole-functionalized polysiloxane. At temperatures below T = 260 K, hydrogen bonding between neighboring heterocycles is observed and a dimer formation can be excluded. From the temperature dependence of 1H MAS NMR spectra, different dynamic processes of the triazole ring contributing to the proton conduction process are qualitatively and quantitatively analyzed and detailed insight into the conduction mechanism and temperature-dependent structural changes is obtained. Although the dynamics processes on the molecular level are qualitatively in good agreement with the findings from macroscopic conductivity measurements, temperature-dependent factors on mesoscopic scales beyond the local molecular mobility influence the macroscopic conductivity and hamper quantitative interpretation. © 2009 American Chemical Society.

Publication Title

Journal of Physical Chemistry B

Publication Date

7-9-2009

Volume

113

Issue

27

First Page

9151

Last Page

9160

ISSN

1520-6106

DOI

10.1021/jp9030909

Repository Citation

Akbey, Ümit; Granados-Focil, Sergio; Coughlin, E. Bryan; Graf, Robert; and Spiess, Hans Wolfgang, "¹H Solid-State NMR Investigation of Structure and Dynamics of Anhydrous Proton Conducting Triazole-Functionalized Siloxane Polymers" (2009). Chemistry. 91.
https://commons.clarku.edu/chemistry/91