Dear All,
I am trying to set up band-selective homonuclear decoupling on an Inova
500, with 3 RF channels, and waveform generators on channels 1 and 2.
The sample is 3-heptanone in chloroform-d, and I’ve created a SEDUCE
shape for the decoupler, named sed1, with modulation cycle 47.3652 ms,
dmf=2990, dres=9, and power 13 dB, to decouple the protons alpha to the
carbonyl. I assume the hardware works, for instance I can get a clean
TOCSY1D on this sample.
In an experiment with the proton spectrum with sw=1924, I set dmf=’p’,
dseq=’sed1’, dres=9, dmf=2990, dpwr=13, d1=1, at=2, dm=’nny’ homo=’y’,
and the result is a normal proton spectrum with no decoupling.
Like everybody, I’m assuming I’m doing everything right, and I guess
that the problem is coming from the accommodation of the pulse segments
between the acquisition of points. Does anyone have a solution for this?
Thank you,
Ion
Ion Ghiviriga
Director of the NMR Facility
Department of Chemistry, University of Florida
393 Leigh Hall
PO Box 117200
Gainesville, FL 32611-7200
Phone/Fax: 352-846-3001
e-mail: ion_at_chem.ufl.edu
http://www.chem.ufl.edu/~nmr/Ion
Received on Thu Apr 10 2008 - 11:35:49 MST