Determination of accurate ¹⁹F chemical shift tensors with R-symmetry recoupling at high MAS frequencies (60-100 kHz).

ABSTRACT: Fluorination is a versatile and valuable modification for numerous systems, and ¹⁹F NMR spectroscopy is the premier method for their structural characterization. ¹⁹F chemical shift anisotropy is a sensitive probe of structure and dynamics, even though ¹⁹F chemical shift tensors have been reported for only a handful of systems to date. Here, we explore γ-encoded R-symmetry based recoupling sequences for the determination of ¹⁹F chemical shift tensors in fully protonated organic solids at high, 60-100 kHz MAS frequencies. We show that the performance of ¹⁹F-RNCSA experiments improves with increasing MAS frequencies, and that ¹H decoupling is required to determine accurate chemical shift tensor parameters. In addition, these se

SUBMITTER: Porat-Dahlerbruch G 

PROVIDER: S-EPMC10280466 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature