Radio frequency assisted homonuclear recoupling - A Floquet description of homonuclear recoupling via surrounding heteronuclei in fully protonated to fully deuterated systems
Radio frequency assisted homonuclear recoupling - A Floquet description of homonuclear recoupling via surrounding heteronuclei in fully protonated to fully deuterated systems
Publication year: 2011 Source: Journal of Magnetic Resonance, In Press, Accepted Manuscript, Available online 18 January 2011
Michal, Leskes , Ümit, Akbey , Hartmut, Oschkinat , Barth-Jan, van Rossum , Shimon, Vega
We present a Floquet theory approach for the analysis of homonuclear recoupling assisted by radio frequency (RF) irradiation of surrounding heteronuclear spins. This description covers a broad range of systems from fully protonated to deuterated proteins, focusing in detail on recoupling via protons and deuterons separately as well as simultaneously by the double nucleus enhanced recoupling (DONER) scheme. The theoretical description, supported by numerical simulations and compared to experimental results from a partially deuterated model compound, indicates that in perdeuterated systems setting the RF amplitude equal to the magic angle spinning (MAS) frequency is not necessarily optimal for recoupling via...
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Recoupling of native homonuclear dipolar couplings in magic-angle-spinning solid-stat
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Broadband 15Nâ??13C dipolar recoupling via symmetry-based RF pulse schemes at high MA
Abstract An approach for generating efficient
RNnnS, nk symmetry-based dual channel RF pulse schemes for γ-encoded broadband 15Nâ??13C dipolar recoupling at high magic angle spinning frequencies is presented. The method involves the numerical optimisation of the RF phase-modulation profile of the basic â??Râ?? element so as to obtain heteronuclear double quantum dipolar recoupling sequences with satisfactory magnetisation transfer characteristics. The basic â??Râ?? element was implemented as a sandwich of a small number of short pulses of equal duration with each pulse characterised by...
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08-14-2010 04:19 AM
why radio frequency
Dear sir,
Why we are using radio frequency excluding other electro magnetic radiation.
thankx
Radio frequency assisted homonuclear recoupling - A Floquet description of homonuclear recoupling via surrounding heteronuclei in fully protonated to fully deuterated systems
Linear Mode
