Pike, K.J., Ashbrook, S.E. and Wimperis, S. (2001) Two-dimensional satellite-transition MAS NMR of quadrupolar nuclei: shifted echoes, high-spin nuclei and resolution. Chemical Physics Letters, 345(5-6), pp. 400-408. (doi: 10.1016/S0009-2614(01)00912-5)
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Abstract
Modifications to the satellite-transition magic angle spinning (STMAS) experiment for obtaining high-resolution NMR spectra of quadrupolar nuclei are discussed. A phase-modulated `shifted-echo' STMAS experiment that yields pure absorptive lineshapes is presented and shown to be compatible with the `split-t1' technique used in multiple-quantum (MQ) MAS NMR to reduce the duration of t2 acquisition and avoid shearing the final two-dimensional spectrum. The application of STMAS to nuclei with spin greater than I=3/2 is also considered, the dispersion of isotropic shifts achieved by STMAS and MQMAS are compared, and the effects of anisotropic `cross-term' broadening mechanisms on linewidths in `isotropic' STMAS spectra are discussed.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Wimperis, Professor Stephen |
| Authors: | Pike, K.J., Ashbrook, S.E., and Wimperis, S. |
| Subjects: | Q Science > QD Chemistry |
| College/School: | College of Science and Engineering > School of Chemistry |
| Journal Name: | Chemical Physics Letters |
| ISSN: | 0009-2614 |
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