Abstract
We propose a novel approach to markedly reduce rf power for both 1H and observed nuclei during spin exchange for separated local field experiments. The rf power to satisfy the Hartmann–Hahn matching conditions during spin exchange for observed nuclei was arbitrarily reduced by alternating the directions of effective fields for 1H nuclei with unequal duration times and amplitudes. The proposed techniques were compared experimentally with those developed previously by the authors. The rf power for observed nuclei and average 1H were reduced by factors of 9 and 2, respectively, for 13C NMR signals of liquid crystalline 5CB.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
