A "magic sandwich" pulse sequence with reduced offset dependence for high-resolution separated local field spectroscopy |
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Authors: | Nevzorov Alexander A Opella Stanley J |
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Institution: | Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093-0307, USA. |
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Abstract: | A pulse sequence for high resolution separated local field spectroscopy based on "magic sandwich" elements is demonstrated on a single crystal sample. Simulations and experimental results show that this pulse sequence has a reduced frequency offset dependence compared to PISEMA (polarization inversion spin exchange at the magic angle). As a result, it has a larger effective range of homonuclear decoupling, reduced zero-frequency spectral distortions, and more reliable scale factors for individual resonances. In addition, it is easier to setup on commercial spectrometers. |
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