Phase coherent excitation of SABRE permits simultaneous hyperpolarization of multiple targets at high magnetic field

TL;DR

This paper introduces a novel pulse sequence method enabling simultaneous hyperpolarization of multiple nuclei at high magnetic fields using SABRE, enhancing NMR sensitivity and broadening practical applications.

Contribution

The study presents a new pulse sequence approach that allows broadband hyperpolarization of multiple targets simultaneously at high magnetic fields, overcoming previous limitations.

Findings

First demonstration of simultaneous hyperpolarization of multiple targets at high field

Broadband excitation method compatible with routine NMR applications

Potential for integration into metabonomics and biomolecular NMR

Abstract

Hyperpolarization methods in magnetic resonance overcome sensitivity limitations, especially for low-{\gamma} nuclei such as 13C and 15N. Signal Amplification By Reversible Exchange (SABRE) and extended SABRE (X-SABRE) are efficient and low-cost methods for generating large polarizations on a variety of nuclei, but they most commonly use low magnetic fields ({\mu}T-mT). High field approaches, where hyperpolarization is generated directly in the spectrometer, are potentially much more convenient but have been limited to selectively hyperpolarize single targets. Here we introduce a new pulse sequence-based approach that affords broadband excitation of SABRE hyperpolarization at high magnetic fields without having to tailor pulse sequence parameters to specific targets. This permits simultaneous hyperpolarization of multiple targets for the first time at high field and offers a direct approach to integration of high-field SABRE hyperpolarization into routine NMR applications, such as NMR-based metabonomics and biomolecular NMR.