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  • Title: Real-time pure shift measurements for uniformly isotope-labeled molecules using X-selective BIRD homonuclear decoupling.
    Author: Haller JD, Bodor A, Luy B.
    Journal: J Magn Reson; 2019 May; 302():64-71. PubMed ID: 30965191.
    Abstract:
    We introduce a novel selective inversion element for chunked homonuclear decoupling that combines isotope selection via BIRD-filtering with band-selective inversion on the X-heteronucleus and allows efficient real-time decoupling of homonuclear and heteronuclear couplings. It is especially suitable for uniformly isotope-labeled compounds. We discuss in detail the inversion element based on band-selective refocusing on the X-nuclei (BASEREX), highlighting in particular the role of appropriate band-selective shaped refocusing pulses and the application of broadband X-pulses for an effective BIRDd element during homodecoupling. The approach is experimentally verified and studied in detail using uniformly 13C-labeled glucose and a uniformly 15N,13C-labeled amino acid mixture.
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