Coherent Averaging: an Alternative to the Average Hamiltonian Theory

TL;DR

This paper introduces coherent averaging as a new theoretical approach to predict spectral peak heights in NMR, demonstrated through experiments with fast magic-angle spinning proton spectra.

Contribution

It presents a novel theoretical formulation of coherent averaging as an alternative to average Hamiltonian theory for NMR spectral analysis.

Findings

Coherent averaging accurately predicts spectral peak heights.

Experimental validation with fast magic-angle spinning proton spectra.

Provides a new tool for NMR spectral analysis.

Abstract

Line-narrowing by periodic modulation of nuclear spin interaction Hamiltonians is the central element of various experimental techniques in NMR spectroscopy. In this study, we present a theoretical formulation of coherent averaging to calculate the heights of narrowed spectral peaks. This concept is experimentally demonstrated using proton spectra of solids obtained under fast magic-angle spinning.