The interpretation of small molecule diffusion coefficients: Quantitative use of diffusion-ordered NMR spectroscopy

Research output: Contribution to journalReview article

Abstract

Measuring accurate molecular self-diffusion coefficients, D, by nuclear magnetic resonance (NMR) techniques has become routine as hardware, software and experimental methodologies have all improved. However, the quantitative interpretation of such data remains difficult, particularly for small molecules. This review article first provides a description of, and explanation for, the failure of the Stokes-Einstein equation to accurately predict small molecule diffusion coefficients, before moving on to three broadly complementary methods for their quantitative interpretation. Two are based on power laws, but differ in the nature of the reference molecules used. The third addresses the uncertainties in the Stokes-Einstein equation directly. For all three methods, a wide range of examples are used to show the range of chemistry to which diffusion NMR can be applied, and how best to implement the different methods to obtain quantitative information from the chemical systems studied.
Original languageEnglish
Pages (from-to)33-69
Number of pages37
JournalProgress in Nuclear Magnetic Resonance Spectroscopy
Volume117
Early online date26 Nov 2019
DOIs
Publication statusPublished - 1 Apr 2020

Bibliographical note

© 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

  • DOSY
  • Diffusion NMR
  • Molecular weight
  • Stokes-Einstein equation

Fingerprint Dive into the research topics of 'The interpretation of small molecule diffusion coefficients: Quantitative use of diffusion-ordered NMR spectroscopy'. Together they form a unique fingerprint.

  • Cite this