Unravelling the synthesis of a rare-earth cluster-based metal–organic framework with spn topology

Abstract

Y-CU-45, an analogue of Zr-MOF-808, is synthesized for the first time. Several reaction conditions are tested demonstrating that two fluorinated modulators are required for a reproducible synthesis yielding high quality material. Y-CU-45 shows high crystallinity and surface area, shining light on the potential for rare-earth cluster-based MOFs with open metal sites.

Synthesis of Fluoro-Bridged Ho3+ and Gd3+ 1,3,5-Tris(4-carboxyphenyl)benzene Metal–Organic Frameworks from Perfluoroalkyl Substances

“…It is proposed that the 2-FBA must first bind to the metal before the fluoride can be removed in solvents such as N , N ′-dimethylformamide (DMF), N , N ′-diethylformamide (DEF), or dimethylacetamide (DMAC). , A nucleophile such as dimethylamine (DMA) can then replace fluorine. , Recent publications on RE-based MOFs utilizing 2-FBA as a modulator have also shown the presence of μ 3 -OH/F bridges in a hexanuclear cluster based 2D MOF and μ 3 -O/F bridges in a Yb-based nonanuclear cluster. − In the present study, a dimeric complex formulated as bis(2,2′-bipyridine)tetrakis(μ-2-fluorobenzoato- O , O ′)-bis(2-fluorobenzoato)diRE(III) (RE = Ho 3+ and Gd 3+ ) 1 was prepared in water. The Ho version of 1 as well as the isostructural version with Sm 3+ were previously reported, both in an ethanolic solution. , Using water or an ethanolic solution as the solvent, the intact 2-FBA ions were bound to the rare-earth metals.…”