Metal-organic frameworks (MOFs) have become the largest branch of porous materials. Although MOFs have many applications, the local structures of metal ions, organic linkers, and guest behaviors underpinning the MOF properties are often not well understood at molecular level. Solid-state NMR (SSNMR) spectroscopy is a powerful tool for MOF characterization as it provides nuclide specific information and is sensitive to short-range ordering and dynamics....