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  • Title: Efficiency of heteronuclear dipolar decoupling schemes in solid-state NMR: investigation of effective transverse relaxation times.
    Author: Mithu VS, Pratihar S, Paul S, Madhu PK.
    Journal: J Magn Reson; 2012 Jul; 220():8-17. PubMed ID: 22683576.
    Abstract:
    We here compare the T(2)(') values of various heteronuclear dipolar decoupling schemes commonly used in solid-state nuclear magnetic resonance experiments. Swept-frequency two-pulse phase modulation scheme is shown to give longer T(2)(') values for the majority of the magic-angle-spinning frequencies and radiofrequency amplitudes considered here. The longer T(2)(') values obtained are shown to yield spectra with higher resolution in experiments, such as INADEQUATE, which incorporate spin-echo blocks. Such blocks normally constitute the indirect dimension of a multidimensional experiment during which heteronuclear dipolar decoupling is applied, thereby making the relevance of T(2)(') manifest clearly. Experimental results are shown on samples of glycine, alanine, and Aβ(42).
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