Correlation of high-field and zero- to ultralow-field NMR properties using 2D spectroscopy

High-resolution zero-field NMR J-spectroscopy of aromatic compounds.

We report the acquisition and interpretation of nuclear magnetic resonance (NMR) J-spectra at zero magnetic field for a series of benzene derivatives, demonstrating the analytical capabilities of zero-field NMR. The zeroth-order spectral patterns do not overlap, which allows for straightforward determination of the spin interactions of substituent functional groups. Higher-order effects cause a...

Methodical Aspects of 2D NMR Correlation Spectroscopy under Conditions of Ultra High Pulsed Field Gradients

1. Introduction Multidimensional NMR methods have become an important tool in the 1970s. In the past years a new set of experiments has developed whose postprocessing is based on a multidimensional inverse Laplace transformation rather than a Fourier transformation which provides the capabilities to find correlations between various parameters such as diffusion coefficients D and NMR relaxation...

Heteronuclear Zero-field Nmr

In zero-field NMR [ 1.21, a sample is subjected to a time-dependent magnetic field which cycles between a high value, Bo, and zero field. The B. field is useful for preparation and high-sensitivity detection of the spins. Evolution occurs for a variable time tl in zero field. This yields sharp crystal-like NMR spectra from polycrystalline samples, where ordinarily only powder patterns are obser...

Zero field NMR and NQR

Methods are described and demonstrated for detecting the coherent evolution of nuclear spin observables in zero magnetic field with the full sensitivity of high field NMR. The principle motivation is to provide a means of obtaining solid state spectra of the magnetic dipole and electric quadrupole interactions of disordered systems without the line broadening associated with random orientation ...

Two-dimensional nuclear magnetic resonance correlation spectroscopy at zero field