Eykyn, Thomas R.; Philp, David J.; Kuchel, Philip W.
Semiselective heteronuclear cross-polarization for achieving coherence transfer between a spin I=1/2 scalar coupled to a spin S⩾1/2 in isotropic solution is considered. The expansion of the density operator as products of irreducible tensor operators provides a compact formalism for describing cross-polarization involving scalar coupled quadrupolar nuclei. An analytical description of cross-polarization is presented in the limit of strong radio-frequency (rf) fields, with respect to the...[Show more]
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