NMR cross polarization by adiabatic passage through the Hartmann-Hahn condition (APHH)

The heteronuclear cross-polarization efficiency in the rotating frame can be improved by sweeping the radiofrequency amplitude adiabatically through the Hartmann-Hahn condition. The enhancement is particularly significant for strongly coupled IS spin systems with weak dipolar coupling to extraneous spins. A good approxn. to an adiabatic transfer is obtained with a tangential time dependence of the radiofrequency field amplitude whereby transient oscillations are efficiently suppressed. [on SciFinder (R)]


Published in:
Chemical Physics Letters, 223, 4, 283-8
Year:
1994
Laboratories:




 Record created 2006-02-22, last modified 2018-03-17


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)