Chirality-sensitive Nuclear Magnetoelectric Resonance

Introduction

This project lifts the blindness of nuclear magnetic resonance (NMR) spectroscopy to molecular chirality. First, we will observe chirality-sensitive magnetoelectric effects. Based on these effects, a new branch of molecular spectroscopy (abbreviated as NMER) is proposed, which will enable us to identify enantiomers directly without requiring chemical shift reagents or chiral solvents.

Methodology

Direct chiral NMR effects are very small and have not been previously detected, but this proposal will utilize several unique new strategies, such as hyperpolarization techniques and novel instrumentation, to dramatically enhance the chirality-sensitive NMR signals. This new approach is necessary to observe chirality-sensitive effects in solution at frequencies lower than 10 GHz.

Applications

This methodology permits:

1. The direct discrimination of chiral molecules.
2. Selective magnetic resonance imaging (MRI) of chiral molecules.
3. Determination of the absolute configuration of the molecule.

In contrast to standard methods used in NMR, it does not require chemical modification of the sample. Consequently, it has many potential application fields, including:

• Analytical chemistry (determination of enantiopurity, resolution of complex mixtures of chiral substances).
• Biochemistry (studies of interactions between chiral molecules).
• Pharmaceutical science (diagnostic imaging, studies of the pharmaceutical mechanism of action).

Enhanced Sensitivity

At the same time, the new methodology will dramatically increase the detection sensitivity, rendering it possible to:

4. Record NMR spectra from molecules in the gas phase under conditions of low partial pressure.

Conclusion

This unique form of spectroscopy will be used as an analytical tool and will permit studies of chiral molecules interactions. In combination with state-of-the-art quantum computations, it will provide valuable data on NMR tensors and allow models of fundamental interactions involving chirality to be tested on the molecular scale.