Journal
JOURNAL OF MAGNETIC RESONANCE
Volume 302, Issue -, Pages 64-71Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmr.2019.03.011
Keywords
Inversion element; Band selective; Homonuclear decoupling; BIRD; Real-time; Pure shift; Isotope-labeling; BASEREX
Funding
- Deutsche Forschungsgemeinschaft [LU 835/11-1, LU 835/13-1]
- HGF programme Biointerfaces in Technology and Medicine
- ELTE Institutional Excellence Program of the Hungarian Ministry of Human Capacities [1783-3/2018/FEKUTSRAT]
- National Research, Development and Innovation Office, Hungary [NKFI K124900]
- Deutsche Forschungsgemeinschaft
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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 C-13-labeled glucose and a uniformly N-15, C-13-labeled amino acid mixture. (C) 2019 Elsevier Inc. All rights reserved.
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