Proton Transport in Imidazoles: Unraveling the Role of Supramolecular Structure
Journal Article
·
· Journal of Physical Chemistry Letters
- Univ. of Tennessee, Knoxville, TN (United States)
- Univ. of Pennsylvania, Philadelphia, PA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
The impact of supramolecular hydrogen bonded networks on dynamics and charge transport in 2-ethyl-4-methylimidazole (2E4MIm), a model proton-conducting system, is investigated by broadband dielectric spectroscopy, depolarized dynamic light scattering, viscometry, and calorimetry. It is observed that the slow, Debye-like relaxation reflecting the supramolecular structure in neat 2E4MIm is eliminated upon the addition of minute amounts of levulinic acid. This is attributed to the dissociation of imidazole molecules and the breaking down of hydrogen-bonded chains, which leads to a 10-fold enhancement of ionic conductivity.
- Research Organization:
- Oak Ridge National Laboratory (ORNL). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1222571
- Journal Information:
- Journal of Physical Chemistry Letters, Vol. 6, Issue 19; ISSN 1948-7185
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 21 works
Citation information provided by
Web of Science
Web of Science
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Conformational aspects of polymorphs and phases of 2-propyl-1 H -benzimidazole
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