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  • Title: Why does PMLG proton decoupling work at 65kHz MAS?
    Author: Leskes M, Madhu PK, Vega S.
    Journal: J Magn Reson; 2009 Aug; 199(2):208-13. PubMed ID: 19482494.
    Abstract:
    Schemes such as phase-modulated Lee-Goldburg (PMLG) for homonuclear dipolar decoupling have been shown to yield high-resolution (1)H spectra at high magic-angle spinning (MAS) frequencies of 50-70kHz. This is at variance to the commonly held notion that these methods require MAS frequencies not comparable to the cycle frequencies of the pulse schemes. Here, a theoretical argument, based on bimodal Floquet theory, is presented to explain this aspect together with conditions where PMLG type of schemes may be successful at high MAS frequencies.
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