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r TPPM: Towards improving solid-state NMR two-pulse phase-modulation heteronuclear dipolar decoupling sequence by refocusing

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

  • Asif Equbal
  • Subhradip Paul
  • Venus Singh Mithu
  • Joachim Møllesøe Vinther
  • Niels Chr Nielsen
  • P K Madhu

We present here a simple refocused modification, r TPPM, of the Two-Pulse Phase-Modulation (TPPM) heteronuclear decoupling method, which improves decoupling and makes the sequence much more robust with respect to essential experimental parameters. The modified sequence is compared with the established TPPM sequence and a variety of other decoupling sequences at low to moderate magic-angle spinning frequencies. Simulations are shown to compare TPPM and r TPPM with respect to various experimental parameters. The observations from simulations are corroborated with experimental findings at two spinning frequencies on U-(13)C-glycine and U-(13)C-L-histidine.HCl.H2O.

OriginalsprogEngelsk
TidsskriftJournal of Magnetic Resonance
Vol/bind244
Sider (fra-til)68-73
Antal sider6
ISSN1090-7807
DOI
StatusUdgivet - jul. 2014

ID: 118038579