Single-transition coherence transfer by adiabatic cross polarization in NMR

A new method for the spin-state-selective coherence transfer is introduced based on the principles of adiabatic cross polarization. The method is called single-transition adiabatic cross polarization (ST-ACP). It was analyzed theor. for a scalar-coupled 2-spin 1/2 system. An exptl. test was also developed which reveals the violations from adiabacity. NMR measurements were performed on 15N-enriched samples of tert-butoxycarbonyl-protected glycine. The reversibility of the coherence transfer serves as the exptl. criterion for the adiabacity. [on SciFinder (R)]