Solution-State 2D NMR Spectroscopy of Mixtures HyperpolarizedUsing Optically Polarized Crystals

Angew Chem Int Ed Engl. 2023 Dec 11;62(50):e202312302. doi: 10.1002/anie.202312302. Epub 2023 Nov 13.

Abstract

The HYPNOESYS method (Hyperpolarized NOE System), which relies on the dissolution of optically polarized crystals, has recently emerged as a promising approach to enhance the sensitivity of NMR spectroscopy in the solution state. However, HYPNOESYS is a single-shot method that is not generally compatible with multidimensional NMR. Here we show that 2D NMR spectra can be obtained from HYPNOESYS-polarized samples, using single-scan acquisition methods. The approach is illustrated with a mixture of terpene molecules and a benchtop NMR spectrometer, paving the way to a sensitive, information-rich and affordable analytical method.

Keywords: Benchtop NMR; Correlation Spectroscopy (COSY); Hyperpolarized NMR; Terpenes; Ultrafast Two-Dimensional NMR Spectroscopy.