Synthesis of the novel MOF hcp UiO-66 employing ionic liquids as a linker precursor

Abstract

The novel MOF hcp UiO-66 is synthesized using the ionic liquid ([PBuMEE]2[BDC]) as a linker precursor.

Salting-in species induced self-assembly of stable MOFs

“…These were in good agreement with those typically observed for hcp MOFs. 20,38 The TGA curve showed that the hcp-UiO-66-NaI was stable up to 450 C. The weight loss of 39.6% from 300 to 800 C matched well with the theoretical weight loss of 40.5% based on the conversion of Zr 12 O 15 (BDC) 9 to (ZrO 2 ) 12 (see ESI, Fig. S7 †).…”

“…Its structure could be viewed as a fusion of two commonly observed Zr 6 clusters. 20,38 A previous study has reported that the formation of hcp structure was due to the low solubility of the ligands in the synthesis media and the presence of large modulators. 38 Therefore, the limited solubilization capacity of the applied SS in combination with the AA rationalized the generation of the hcp phase structure by the developed SSISA strategy.…”

“…17,18 Such a unique "solubilization-mediating" mechanism is signicantly conducive to increase the reaction probability of the MOF precursors, thus facilitating the aqueousphase construction of the well-crystallized MOFs under mild conditions. We have exemplied the validity of our strategy through the successful synthesis of a series of stable MOFs including UiO-66(Zr) with different topological structures, 19,20 UiO-66(Hf), 21 UiO-66(Ce), 22 MIL-53(Al), 23 MIL-101(Cr) 24 as well as their derivatives. The specic self-assembly prerequisites of different stable MOFs were met due to the availability of various SS.…”

MOF thin films with bi-aromatic linkers grown by molecular layer deposition

“…These are named DUT-52, DUT-53 and DUT-84. In addition, it is possible that other structures can be made, for instance, structures with "double clusters" like the ones reported by Cliffe et al 31 and Ermer et al 32 The Zr-BP-4,4 0 -DC lms crystallize to form a small amount of UiO-67 (or a similar phase) and a larger amount of an unknown phase (Fig. 6b).…”

Modulated synthesis of thiol-functionalized fcu and hcp UiO-66(Zr) for the removal of silver(i) ions from water

“…When using high amounts HMAc (100 eq) versus ZrCl 4 we identified a change in the structure from the usual UiO-66 facecentered cubic (fcu) 48 to a hexagonal close packed (hcp) structure, which was rarely described in literature after the first observation in 2018. 49 To the best of our knowledge we herein present the first functionalized structure of a hcp UiO-66 MOF. We tested two of the synthesized MOFs in the removal capacities of silver(I) from aqueous solution.…”