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Title: Proton Transport in Imidazoles: Unraveling the Role of Supramolecular Structure

Journal Article · · Journal of Physical Chemistry Letters
 [1];  [1];  [2];  [3];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of Pennsylvania, Philadelphia, PA (United States)
  3. 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
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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Cited By (2)

Conformational aspects of polymorphs and phases of 2-propyl-1 H -benzimidazole journal September 2018
Conformational aspects of polymorphs and phases of 2-propyl-1 H -benzimidazole text January 2018

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