Isomeric Scandium–Organic Frameworks with High Hydrolytic Stability and Selective Adsorption of Acetylene

Two solvent-controlled topological isomers of scandium-organic frameworks [Sc(Hpzc)(pzc)]·DMF·2H2O (1·DMF·2H2O) and [Sc(Hpzc)(pzc)]·DMA·4H2O (2·DMA·4H2O) were synthesized using 2,5-pyrazinedicarboxylate (pzc2-) (DMF = dimethylformamide; DMA dimethylacetamide). Despite the isomeric nature obtained metal-organic (MOFs), they possess different structural features unique adsorption properties toward gases iodine. The compound 1 has widely spread among MOF structures a dia topology with ultranarrow channels, which together inner surface functionalization leads to enhanced CO2 high selectivity factors in CO2/CH4 CO2/N2 gas mixtures (25.9 35.6, respectively, 1/1 v/v). Moreover, rare preferable over C2H2 was demonstrated. biporous framework 2 crb inherent zeolites. A remarkable affinity ideal adsorbed solution theory factor 127.1 for C2H2/C2H4 mixture (1/99 v/v) achieved 2. Both compounds have exceptional chemical stability wide range pH from acidic basic media.