Steric stabilization of colloidal UiO-66 nanocrystals with oleylammonium octadecylphosphonate.

ABSTRACT: We report the synthesis and characterization of octahedral UiO-66 nanocrystals (d = 17-25 nm) terminated with amine, oleate, and octadecylphosphonate ligands. Acetate capped UiO-66 nanocrystals were dispersed in toluene using oleic acid and oleylamine. Ligand exchange with octadecylphosphonic acid produces ammonium octadecylphosphonate terminated nanocrystals with coverages of 2.6-3.2 chains per nm² that stabilize colloidal dispersions in nonpolar solvents. Liquid phase ¹H and ³¹P nuclear magnetic resonance (NMR) spectra of the linkers and surface ligands display line shapes that are broadened by slow tumbling of the nanocrystals. Octadecylphosphonate functionalized MOFs have up to ∼30% carbon dioxide absorption capacities compared to bulk UiO-66 aft

SUBMITTER: Park SV 

PROVIDER: S-EPMC11626757 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature