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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Jiejun Wu NMR Facility Manager
Dept. of Chemistry (949)824-6010 (office)
516 Physical Sciences 1 (949)824-5649 (lab)
Univ. of California, Irvine (949)824-8571 (fax)
Irvine, CA 92697-2025 jwu@uci.edu (internet)