Amine-Tagged Fragmented Ligand Installation for Covalent Modification of MOF-74.
MOF-74 is one of the most explored metal-organic frameworks (MOFs), but its functionalization is limited to the dative post-synthetic modification (PSM) of the monodentate solvent site. Owing to the nature of the organic ligand and framework structure of MOF-74, the covalent PSM of MOF-74 is very demanding. Herein, we report, for the first time, the covalent PSM of amine-tagged defective Ni-MOF-74, which is prepared by de novo solvothermal synthesis by using aminosalicylic acid as a functionalized fragmented organic ligand. The covalent PSM of the amino group generates metal binding sites, and subsequent post-synthetic metalation with PdII ions affords the PdII -incorporated Ni-MOF-74 catalyst. This catalyst exhibits highly efficient, size-selective, and recyclable catalytic activity for the Suzuki-Miyaura cross-coupling reaction. This strategy is also useful for the covalent modification of amine-tagged defective Ni2 (DOBPDC), an expanded analogue of MOF-74.
['Lim|Jaewoong|J|http://orcid.org/0000-0002-4557-0870', 'Lee|Seonghwan|S|', 'Ha|Hyeonbin|H|', 'Seong|Junmo|J|', 'Jeong|Seok|S|', 'Kim|Min|M|', 'Baek|Seung Bin|SB|http://orcid.org/0000-0003-4407-8486', 'Lah|Myoung Soo|MS|http://orcid.org/0000-0001-9517-7519']
fragmented ligands covalent modification metal-organic frameworks post-synthetic modification heterogeneous catalysis