Extending the range of liquids available for NMR cryoporometry studies of porous materials

Taylor J. Rottreau, Christopher M.a. Parlett, Adam F. Lee, Robert D Evans

Research output: Contribution to journalArticle

Abstract

Nuclear magnetic resonance (NMR) cryoporometry, although well established, can be limited by the inability of any one liquid to probe a broad range of pore sizes, a relatively small number of commonly-used probe liquids and the requirement to match the probe liquid to the chemistry of the material being studied. Here we demonstrate, for the first time, the use of menthol and t-butanol as probe liquids in NMR cryoporometry measurements. Using appropriate estimates for the values of the melting point depression constant, kc, and the non-freezing surface layer, 2sl, NMR melting data was converted into pore size distributions. The melting point depression constant for t-butanol is similar to that of cyclohexane; however due to its functionality, t-butanol may be the preferred liquid used to study the porosity of hydrophilic materials. Menthol, having a larger value of kc, can accurately analyze larger pore sizes up to 100 nm. This represents the first use of menthol and t-butanol to accurately probe pore dimensions in NMR cryoporometry.
Original languageEnglish
Pages (from-to)198-202
Number of pages5
JournalMicroporous and Mesoporous Materials
Volume274
Early online date26 Jul 2018
DOIs
Publication statusPublished - 15 Jan 2019

Bibliographical note

© 2018, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

  • Menthol
  • NMR characterisation
  • NMR cryoporometry
  • Porous materials
  • Probe liquids
  • t-butanol

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