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Title: In-pore exchange and diffusion of carbonate solvent mixtures in nanoporous carbon

Abstract

High resolution magic angle spinning (HRMAS) 1H NMR spectroscopy has been used to resolve different surface and in-pore solvent environments of ethylene carbonate (EC) and dimethyl carbonate (DMC) mixtures absorbed within nanoporous carbon (NPC). Two dimensional (2D) 1H HRMAS NMR exchange measurements revealed that the inhomogeneous broadened in-pore resonances have pore-to-pore exchange rates on the millisecond timescale. Pulsed-field gradient (PFG) NMR diffusometry revealed the in-pore self-diffusion constants for both EC and DMC were reduced by up to a factor of five with respect to the diffusion in the non-absorbed solvent mixtures.

Authors:
 [1];  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1257785
Alternate Identifier(s):
OSTI ID: 1429517
Report Number(s):
SAND2016-3352J
Journal ID: ISSN 0009-2614; PII: S0009261416304092
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Chemical Physics Letters
Additional Journal Information:
Journal Volume: 658; Journal Issue: C; Journal ID: ISSN 0009-2614
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Alam, Todd M., and Osborn Popp, Thomas M. In-pore exchange and diffusion of carbonate solvent mixtures in nanoporous carbon. United States: N. p., 2016. Web. https://doi.org/10.1016/j.cplett.2016.06.014.
Alam, Todd M., & Osborn Popp, Thomas M. In-pore exchange and diffusion of carbonate solvent mixtures in nanoporous carbon. United States. https://doi.org/10.1016/j.cplett.2016.06.014
Alam, Todd M., and Osborn Popp, Thomas M. Sat . "In-pore exchange and diffusion of carbonate solvent mixtures in nanoporous carbon". United States. https://doi.org/10.1016/j.cplett.2016.06.014. https://www.osti.gov/servlets/purl/1257785.
@article{osti_1257785,
title = {In-pore exchange and diffusion of carbonate solvent mixtures in nanoporous carbon},
author = {Alam, Todd M. and Osborn Popp, Thomas M.},
abstractNote = {High resolution magic angle spinning (HRMAS) 1H NMR spectroscopy has been used to resolve different surface and in-pore solvent environments of ethylene carbonate (EC) and dimethyl carbonate (DMC) mixtures absorbed within nanoporous carbon (NPC). Two dimensional (2D) 1H HRMAS NMR exchange measurements revealed that the inhomogeneous broadened in-pore resonances have pore-to-pore exchange rates on the millisecond timescale. Pulsed-field gradient (PFG) NMR diffusometry revealed the in-pore self-diffusion constants for both EC and DMC were reduced by up to a factor of five with respect to the diffusion in the non-absorbed solvent mixtures.},
doi = {10.1016/j.cplett.2016.06.014},
journal = {Chemical Physics Letters},
number = C,
volume = 658,
place = {United States},
year = {2016},
month = {6}
}

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