Vicky,
Thanks for your suggestion. That sounds like a nice way of dealing with it for
now.
Patrick
On Friday 08 June 2007 07:19, Vicky Higman wrote:
> Hi Patrick,
>
> don't think anyone has replied to your message yet. Measuring chemical
> shift differences is in fact already on the To-do list
> (http://www.ccpn.ac.uk/ccpn/software/ccpnmr-analysis/to-do-list/). We've
> got a number of solid-state NMR people who are using CCPN Analysis here
> in Berlin and have been working with the CCPN team to implement various
> features which would be of particular help to solid-state users. We've
> already requested both 'measuring shift distances' and the
> identification of side-bands. But Tim and Wayne have got a long list of
> things to do and I don't know what priority these things have.
> For the moment I have suggested that people mark side-band peaks by
> giving them a low merit in the peak list. If you go to 'Peak Draw
> Parameters' and make sure the Merit Symbol is selected and a symbol
> (e.g. *) for low-merit peaks is included below, then low-merit peaks
> should get a little star next to them. This way your side-band peaks
> will have mark in the spectrum and you won't be tempted to keep trying
> to assign them.
>
> Vicky
>
> Patrick van der Wel wrote:
> > Hello,
> >
> > I am not sure that the subject heading exactly captures what I would like
> > to do, so here is a more detailed description: Would it be possible in
> > Analysis to measure (i.e. display) the chemical shift difference between
> > two arbitrary points in one spectrum? What I mean by this is the ability
> > to 'mark' or indicate two points in the spectrum and have the program
> > display the exact differences in both (or more) axes? Preferably in both
> > (k)Hz and ppm?
> >
> > For solid state NMR applications this could be particularly interesting
> > for picking out side bands appearing in the spectra, or compare the
> > chemical shift difference between two peaks with the MAS rate (to
> > determine possible R2 conditions, for instance). For such purposes,
> > units of kHz would be most practical.
> >
> > By the way, it might actually be nice to (at some point) have some
> > capabilities to mark (or 'assign') particular spinning side bands within
> > SSNMR spectra. Currently those remain usually unmarked and could cause
> > some confusion with 'real' peaks. Especially folded or aliased side bands
> > can be tricky to identify.
> >
> > Patrick
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