Molecular identification and quantification of defect sites in metal-organic frameworks with NMR probe molecules.

ABSTRACT: The defects in metal-organic frameworks (MOFs) can dramatically alter their pore structure and chemical properties. However, it has been a great challenge to characterize the molecular structure of defects, especially when the defects are distributed irregularly in the lattice. In this work, we applied a characterization strategy based on solid-state nuclear magnetic resonance (NMR) to assess the chemistry of defects. This strategy takes advantage of the coordination-sensitive phosphorus probe molecules, e.g., trimethylphosphine (TMP) and trimethylphosphine oxide (TMPO), that can distinguish the subtle differences in the acidity of defects. A variety of local chemical environments have been identified in defective and ideal MOF lattices. The geometric dimension of defects can also be evalu

SUBMITTER: Yin J 

PROVIDER: S-EPMC9427814 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature