title: A Simple NMR-Based Method for Studying the Spatial Distribution of Linkers within Mixed-Linker Metal-Organic Frameworks.
abstract: The spatial distribution of different linkers within mixed-linker metal-organic frameworks crucially influences the properties of such materials. A simple and robust approach based on (1)H spin-diffusion magic-angle-spinning nuclear magnetic resonance measurements and modeling of spin-diffusion curves is presented; this approach facilitates the distinction between homogeneous and clustered distributions. The performance of the approach is demonstrated with an example of an aluminum-based metal-organic material DUT-5, which has framework consisting of biphenyl and bipyridyl dicarboxylic linkers. The distribution is shown to be homogeneous in this material. The approach could be applied to studying other spatially disordered crystalline materials.
authors.affiliation: Laboratory for Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1001 Ljubljana (Slovenia).|Jozef Stefan International Postgraduate School, Jamova cesta 39, 1000 Ljubljana (Slovenia).
authors.forename: Andraž
authors.initials: A
authors.lastname: Krajnc
authors.affiliation: Laboratory for Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1001 Ljubljana (Slovenia).
authors.forename: Tomaž
authors.initials: T
authors.lastname: Kos
authors.affiliation: Laboratory for Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1001 Ljubljana (Slovenia).|University of Nova Gorica, Vipavska 13, 5000 Nova Gorica (Slovenia).
authors.forename: Nataša
authors.initials: N
authors.lastname: Zabukovec Logar
authors.affiliation: Laboratory for Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1001 Ljubljana (Slovenia). gregor.mali@ki.si.
authors.forename: Gregor
authors.initials: G
authors.lastname: Mali
keywords: NMR spectroscopy; linker distribution; metal-organic frameworks; modeling; proton spin diffusion