Dynamic Nuclear Polarization Enhanced Nuclear Spin Optical Rotation

Angew Chem Int Ed Engl. 2021 Apr 12;60(16):8823-8826. doi: 10.1002/anie.202016412. Epub 2021 Mar 9.

Abstract

Nuclear spin optical rotation (NSOR) has been investigated as a magneto-optical effect, which holds the potential for applications, including hybrid optical-nuclear magnetic resonance (NMR) spectroscopy and gradientless imaging. The intrinsic nature of NSOR renders its detection relatively insensitive, which has prevented it moving from a proof of concept to a method supporting chemical characterizations. In this work, the dissolution dynamic nuclear polarization technique is introduced to provide nuclear spin polarization, increasing the signal-to-noise ratio by several thousand times. NSOR signals of 1 H and 19 F nuclei are observed in a single scan for diluted compounds, which has made this effect suitable for the determination of electronic transitions from a specific nucleus in a large molecule.

Keywords: Faraday effect; NMR spectroscopy; hyperpolarization; nuclear spin optical rotation.