Water - Stable 2-D Zr MOFs with Exceptional UO22+ Sorption Capability
Two new 8-connected 2-D MOFs, UCY-13 and UCY-14 based on Zr6 secondary building units (SBUs) and angular dicarboxylate ligands are reported. UCY-13 and UCY-14 display remarkable stability in various types of aqueous media, appreciable internal surface area of 925 m2/g and 678 m2/g, respectively and are the first examples of 2-D MOFs that were investigated for their uranyl sorption capability. They exhibit exceptional UO22+ sorption capacities of 984 mg/g for UCY-13 and 471 mg/g for UCY-14 and ability to sorb UO22+ from various types of real – world aqueous media. Both sorbents were proven to immobilize UO22+ ions being unique examples of MOFs that can be potentially employed as barrier materials for environmental application. Their exceptional sorption properties are attributed to the 2-D nature and structural features directly derived from it such as the presence of several easily accessible coordination sites in the Zr6 SBUs.
- This article is part of the themed collection: 2019 Journal of Materials Chemistry A HOT Papers