Improved Proton Decoupling in NMR Spectroscopy of Crystalline Solids Using the SPINAL-64 Sequence |
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Authors: | Thomas Bräuniger Philip Wormald Paul Hodgkinson |
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Institution: | (1) Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, United Kingdom, GB |
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Abstract: | Summary. The performance of three different spin decoupling schemes, CW, TPPM, and SPINAL-64 is compared, by recording proton decoupled 13C NMR spectra of a crystalline glycine sample, with 20% isotopic labelling. At a magnetic field of B
0 = 14.1 T, the two phase modulated pulse schemes, TPPM and SPINAL-64, are shown to give decisively better results than CW decoupling, and the SPINAL-64 sequence is found to perform better than TPPM. It is suggested that in NMR of crystalline solids, SPINAL-64 offers a viable and competitive alternative to the well established TPPM decoupling technique, especially at higher magnetic fields.
Corresponding author. E-mail: thomas.braeuniger@durham.ac.uk
Received May 6, 2002; accepted May 22, 2002 |
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Keywords: | , Glycine, NMR spectroscopy, Proton decoupling, Solid state, SPINAL-64, |
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