Improvements to the magic angle hopping experiment.
Several improvements to the magic angle hopping experiment first introduced by Bax et al. [J. Magn. Reson., 52 (1983) 147] are presented. A dc servo motor driven sample hopping mechanism which requires less than 60 ms to accomplish a 120 degrees sample rotation is described. Modifications to the data acquisition process, including starting the acquisition period immediately after the second hop and acquiring a hypercomplex data set, are also presented. Principal values of the 13C chemical shielding tensor are measured for 1,2,3-trimethoxybenzene and 2,6-dimethoxynaphthalene.
Hu
J Z
JZ
Department of Chemistry, University of Utah, Salt Lake City 84112.
Orendt
A M
AM
Alderman
D W
DW
Ye
C
C
Pugmire
R J
RJ
Grant
D M
DM
D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D010720:Phosphines / Q000737:chemistry*
D010720:Phosphines