Two-dimensional Zr/Hf-hydroxamate metal–organic frameworks

Abstract

Novel two-dimensional kagome metal-organic frameworks with mononuclear Zr4+/Hf4+ nodes chelated by benzene-1,4-dihydroxamate linkers were synthesized. The MOFs, namely SUM-1, are chemically robust and kinetically favorable, as confirmed by theoretical and...

A siderophore-inspired two-dimensional Fe–hydroxamate metal–organic framework

“…15 Recently, MOFs have been designed and prepared based on hydroxamates and other chelating groups such as o -diamine, o -dithiol, catechol, etc. 16–22 These MOFs' characteristics include facile synthesis and stable crystals which confirm the hypothesized advantages of using fast chelation to trap individual cations and form products with mononuclear nodes. In particular, representative mononuclear SBUs of MUV-11, 19 Fe-HAF-1, 20 SUM-1 (ref.…”

“…In particular, representative mononuclear SBUs of MUV-11, 19 Fe-HAF-1, 20 SUM-1 (ref. 21) and SUM-9 (ref. 23) are illustrated in Scheme 1, with parameters listed in Table S1,† along with other MOFs.…”

“…As part of our ongoing work trying to expand the class of hydroxamate-based MOFs, 21,23,24 here we report the synthesis of an Fe–hydroxamate MOF starting from Fe(NO 3 ) 3 ·9H 2 O and aliphatic ligand E -ethylenedihydroxamic acid ( E -H 2 edh) which was previously used to connect metal sites in individual ferritin proteins and form three-dimensional lattices. 25 Solvothermal reaction in a mixture of N , N -dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) yielded ∼100 μm maroon block-shaped crystals (Fig.…”

“…2b), indicating thermal lability comparing to its aromatic hydroxamate-based MOF counterparts. 19–23 The approx. 31.12% solvent content corresponds to a composition of Fe 8 (edh) 12 ·3DMSO·13.5DMF, which agrees well with the CHNS elemental analysis results (for details, see ESI† section 3.2).…”

Metal‐Organic Frameworks with Rod Yttrium Secondary Building Units

“…Furthermore, the presence of an −NH group on the hydroxamate linker may increase the hydrophilicity of the pore environment and provide an additional adsorption site for guest molecules. However, this field in reticular chemistry is still underdeveloped, and only a few hydroxamate MOFs with discrete metal clustered‐based SBUs have been reported [11a–d] . To date, rod MOFs remain largely unexplored because of difficulties in obtaining crystals and making frameworks with permanent porosity [12] .…”