1208112-80-4Relevant academic research and scientific papers
Microporosity Enhancement in a One-Dimensional Imidazolium Caged Metal-Organic Framework by Highly Selective Postsynthetic Removal of Inner Yttrium Clusters
Hwang, Chan-Cuk,Jung, Daesung,Kim, Jaheon,Ko, Nakeun,Lee, Eunsung,Lee, Hyun-Jung,Seo, Younggyu
, p. 1020 - 1023 (2021)
A one-dimensional (1D) metal-organic caged framework (YMOF-Y) was obtained via self-assembly of yttrium cations with a U-shape imidazolium based ligand and the structure was elucidated by single-crystal X-ray diffraction analysis. The YMOF-Y has a unique 1D chain structure composed of octa-imidazolium based cages. Inside the cage, an inner Y4 cluster connected to yttrium cations of the cage through formate anions is present. The microporosity and flexibility of YMOF-Y can be improved by an unprecedented postsynthetic removal of the Y4 clusters from the cage by washing with alkali metal solutions. The removal of the Y4 cluster is reflected in a significant change in the properties of the metal-organic framework (MOF), as confirmed by carbon dioxide sorption measurements and variable temperature powder X-ray diffraction analysis.
Synthesis of a zinc(II) imidazolium dicarboxylate ligand metal-organic framework (MOF): A potential precursor to MOF-tethered N-heterocyclic carbene compounds
Crees, Rachel S.,Cole, Marcus L.,Hanton, Lyall R.,Sumby, Christopher J.
experimental part, p. 1712 - 1719 (2010/04/25)
Two new isomeric dinitrile ligands containing imidazoliumsalt cores have been synthesized from cyanoanilines in good yield. These have been converted to the corresponding dicarboxylic acids using hydrobromic acid, or the dicarboxylic acids were synthesized directly from the analogous cyanoaniline starting material in a two-step, one-pot reaction. The crystal structures of three of the four compounds are reported. Two reaction pathways with metals are possible for the dicarboxylic acids, initially giving rise to metal carboxylate based metal-organic frameworks (MOFs) as described in this work or N-heterocyclic carbene (NHC) metal complexes en route to the synthesis of MOFs containing tethered NHC complexes. The reaction of 1, 3-bis(4-carboxyphenyl)imidazolium bromide with zinc nitrate in dimethylformamide (DMF) gave a one-dimensional (1D) MOF containing the intact imidazolium salt. The potentially porous structure, formed from close packing of the 1D necklace-type polymers, contains channels occupied by disordered DMF solvate molecules. A formate anion also bridges the zinc secondary building units in the 1D polymer, which has an undulating structure resulting from the U-shaped conformation of the dicarboxylate imidazolium ligand.
