Showing papers by "Gareth A. Morris published in 1988"
01 Jan 1988
TL;DR: In this paper, a review of the most useful methods for high-resolution NMR is presented, including 2D homo-and hetero-nuclear chemical shift correlation by direct and by relayed coherence transfer, and 1D polarization transfer.
Abstract: The rapid growth during the last decade of multiple pulse methods in one (1D) and two-dimensional (2D) NMR has produced over 100 new techniques of potential use in high-resolution NMR. This review sets out to identify and to illustrate those new methods which are most useful in the determination of molecular structure. Ten basic techniques are considered, including 2D homo- and hetero-nuclear chemical shift correlation by direct and by relayed coherence transfer, and 1D polarization transfer. Numerous variations on the basic techniques, for example multiple quantum filtration, are also discussed. Particular attention is paid to the problems of sensitivity and of the optimum choice of experimental techniques for different classes of structural problem.
142 citations
86 citations
TL;DR: A spirostanol glycoside was isolated from the methanolic extract of the fruits of Asparagus officinalis and characterized by chemical and spectral methods including 13 C NMR-DEPT and 2D-hetcor NMR spectra as discussed by the authors.
22 citations
TL;DR: In this article, three methods for determining the phase and amplitude reproducibility of pulses and of the signals they elicit are discussed, based on the peak amplitudes of dispersion-mode spectra, the second and most versatile on the method of tailored detection, and the third on the signals produced by closely spaced pairs of pulses.
12 citations
TL;DR: In this article, the 13C and 1H assignments for the oligosaccharide segment of a novel spirostanol glycoside were derived, and structural proof obtained, using a combination of DEPT, heteronuclear chemical shift correlation, homonuclear relayed coherence transfer, absolute value COSY, phase-sensitive double quantum filtered CosY, NOESY, INEPT and proton-detected long-range heteronucle shift correlation via multiple quantum coherence.
Abstract: Complete 13C and 1H assignments for the oligosaccharide segment of a novel spirostanol glycoside were derived, and structural proof obtained, using a combination of DEPT, heteronuclear chemical shift correlation, homonuclear relayed coherence transfer, absolute value COSY, phase-sensitive double quantum filtered COSY, NOESY, INEPT and proton-detected long-range heteronuclear shift correlation via multiple quantum coherence.
10 citations
9 citations
5 citations