He developed accordion-optimized long-range heteronuclear shift correlation methods to provide experimental access to small long-range heteronuclear couplings for the characterization of proton- deficient molecular structures, to experimentally access 4J heteronuclear couplings, to differentiate two-bond from three-bond long-range couplings to protonated carbons, to measure long-range heteronuclear couplings and to provide a reliable means of observing long-range proton-nitrogen correlations without concern for the variability of long-range proton nitrogen coupling constants.
