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Updated: Jun 21, 2026

NMR Spectroscopy as a Robust Tool for the Rapid Evaluation of the Lipid Profile of Fish Oil Supplements
Published on: May 1, 2017
High-resolution J-coupled 13C MAS NMR spectroscopy of lipid membranes
Filip Ciesielski1, David C Griffin, Michael Rittig
1School of Biomedical Sciences and Institute of Infection and Immunity, University of Nottingham, Nottingham NG7 2UH, UK.
Abstract:
We propose the use of Lee-Goldburg decoupling in high-resolution natural abundance 13C CP-MAS NMR spectroscopy to obtain J-resolved multiplets from membrane lipids, and the use of these in spectral assignment and to investigate changes in molecular and segmental dynamics within chemical shift-resolved lipid groups. Spectroscopic characteristics of hydrated DPPC bilayers are reported, including J1CH-couplings from the liquid crystalline and gel phases. The observed J1thetaCH values are scaled in the Lee-Goldburg experiment by a factor of approximately 3(-1/2) and corrected J1CH values on the order of 150 Hz compare well with indirect measurements. The J-resolved multiplets show J1thetaCH-couplings from the chain region to be approximately 20% lower than couplings determined from the headgroup, with backbone values falling between the two. Sensitivity of Lee-Goldburg decoupling to molecular motions reveals changes in hydrocarbon chain and backbone segmental dynamics across the main phospholipid transition and reduction in headgroup mobility below the pre-transition.
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