US 4,045,723 A · Two dimensional gyromagnetic resonance spectroscopy

Abstract

The multiplet spectral structure produced by coupled gyromagnetic resonators, such as heteronuclear coupling, is resolved by inducing a train of transient free induction decay (FID) resonances of a first group of gyromagnetic bodies, such as carbon-13 nuclei coupled to a second group of gyromagnetic bodies, such as protons, and detecting the FID resonance. A decoupling r.f. magnetic field is applied to the second group during free induction decay resonance of the first group for decoupling the spins of the first and second groups during detection of resonance of the first group. The duration of the decoupling effect is changed from one successive free induction decay resonance to the next and the detected resonance data is stored as a function of the change in the decoupling effect. The detected resonance data which is a function of two time intervals is then double Fourier transformed into the frequency domain and displayed as a two dimensional plot for resolving the multiplet structure of the spectra of the first group of gyromagnetic bodies.

Claims13

Dependent claims

In a method of gyromagnetic resonance two-dimensional spectroscopy, the steps of:

inducing a plurality of transient gyromagnetic resonances of a first group of gyromagnetic resonators coupled to a second group of gyromagnetic resonators within a sample of matter to be analyzed;
periodically and during only a portion of said transient gyromagnetic resonances of said first group of gyromagnetic resonators perturbing the interaction of the resonance of said first group of gyromagnetic resonators with the second group of resonators to derive a perturbed period of resonance and a coupled period of resonance during each transient resonance of said first group of resonators;
changing the duration of one of said perturbed and coupled periods of successive ones of said transient resonances of said first group of resonators;
and
detecting the induced plurality of said transient gyromagnetic resonances of said first group, as a function of the changing duration of said one of said perturbed and coupled periods of said transient resonances of said first group of resonators to derive gyromagnetic resonance data about said first group of resonators from which to derive simplified gyromagnetic resonance spectral data.

2 more elements

In a gyromagnetic resonance two-dimensional spectrometer:

means for inducing a plurality of transient gyromagnetic resonances of a first group of gyromagnetic resonators coupled to a second group of gyromagnetic resonators within a sample of matter to be analyzed;
means for periodically and during only a portion of said transient gyromagnetic resonances of said first group of gyromagnetic resonators perturbing the interaction of the resonance of said first group of gyromagnetic resonators with the second group of resonators to derive a perturbed period of resonance and a coupled period of resonance during each transient resonance of said first group of resonators;
means for changing the duration of one of said perturbed and coupled periods of successive ones of said transient resonances of said first group of resonators;
and
means for detecting the induced plurality of said transient gyromagnetic resonances of said first group, as a function of the changing duration of said one of said perturbed and coupled periods of said transient resonances of said first group of resonators to derive gyromagnetic resonance data about said first group of resonators from which to derive simplified gyromagnetic resonance spectral data.

2 more elements

Dependencies are inferred from the claim text.

Two dimensional gyromagnetic resonance spectroscopy

Life of this patent

Two dimensional gyromagnetic resonance spectroscopy

Life of this patent

Abstract

Claims13