J. Homer et Mc. Perry, NEW METHOD FOR NMR SIGNAL ENHANCEMENT BY POLARIZATION TRANSFER, AND ATTACHED NUCLEUS TESTING, Journal of the Chemical Society, Chemical Communications, (4), 1994, pp. 373-374
A new NMR pulse sequence that permits signal enhancement of insensitiv
e nuclei by polarization transfer from sensitive nuclei is presented a
nd is illustrated by its application to C-13 NMR Spectroscopy where re
sonances from C-13 in all chemical environments (including quaternary
carbon nuclei) can be-detected simultaneously.