Solid-state NMR spectroscopy at ultrahigh resolution for structural and dynamical studies of MOFs.

ABSTRACT: To characterize the structure and dynamics of metal--organic frameworks (MOFs) in-depth at the molecular level, it is necessary to pursue high-resolution solid-state magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy. Spectral resolution is usually affected by the quality of materials and various experimental conditions, of which magic angle (MA) accuracy is a crucial determinant. The current industrial criteria for MA calibration based on the common standard of KBr were found insufficient in guaranteeing optimal resolution MAS NMR for highly ordered MOFs. To drive towards higher-resolution MAS NMR spectroscopy, we propose a calibration protocol for more accurate MA with a higher-precision criterion based on ⁷⁹Br MAS NMR of KBr, where the linewidth ratio of

SUBMITTER: Wang Q 

PROVIDER: S-EPMC12406566 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature