Re: B11 solid state NMR

Alan Olson (awo@helix.nih.gov)
Thu, 21 May 1998 17:43:31 -0400

Jiejun -
Hmmm, very interesting. I don't know anything about B11 NMR, but Are
they possibly peaks that are folding in: (that would explain the
dispersion) try increasing sw by 50%: do peaks move farther out, or stay at
12800 Hz? I'll be interested in how this turns out.

- Alan Olson

At 2:00 PM -0800 5/21/98, Jiejun Wu wrote:
>Dear All,
>
>I was running B11 solid state NMR on borate glass samples and saw something
>unexpected: At 3 khz MAS rate, the main peak can be phased well, but the
>two sidebands are in dispersion mode. Also they are 180-deg out of phase
>against each other. Separation between them is about 12800 Hz (200 ppm). I
>was on a 200 MHz CMX instrument (B11 = 64.16MHz), sw=545ppm. I wonder why
>are the sidebands out of phase. I would appreciate any help from the
>community. Thanks!
>
>Best Regards,
>
>Jiejun
>

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