J
2021
Maximizing efficiency of dipolar recoupling in solid-state NMR using optimal control sequences
TOSNER, Z., M.J. BRANDL, J. BLAHUT, S.J. GLASER, B. REIF et. al.
Basic information
Original name
Maximizing efficiency of dipolar recoupling in solid-state NMR using optimal control sequences
Authors
TOSNER, Z., M.J. BRANDL, J. BLAHUT, S.J. GLASER and B. REIF
Edition
Science advances, New York, American Association for the Advancement of Science, 2021, 2375-2548
Other information
Type of outcome
Článek v odborném periodiku
Field of Study
10300 1.3 Physical sciences
Country of publisher
United States of America
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 14.957
RIV identification code
RIV/00216224:14740/21:00124435
Organization unit
Central European Institute of Technology
Keywords in English
AMPLITUDE CROSS-POLARIZATION; NUMERICAL-SIMULATION; DOUBLE-RESONANCE; SPECTROSCOPY; RESOLUTION; DESIGN; PULSES; WAVE; NCO
Tags
International impact, Reviewed
V originále
Dipolar recoupling is a central concept in the nuclear magnetic resonance spectroscopy of powdered solids and is used to establish correlations between different nuclei by magnetization transfer. The efficiency of conventional cross-polarization methods is low because of the inherent radio frequency (rf) field inhomogeneity present in the magic angle spinning (MAS) experiments and the large chemical shift anisotropies at high magnetic fields. Very high transfer efficiencies can be obtained using optimal control-derived experiments. These sequences had to be optimized individually for a particular MAS frequency. We show that by adjusting the length and the rf field amplitude of the shaped pulse synchronously with sample rotation, optimal control sequences can be successfully applied over a range of MAS frequencies without the need of reoptimization. This feature greatly enhances their applicability on spectrometers operating at differing external fields where the MAS frequency needs to be adjusted to avoid detrimental resonance effects.
Links
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