Synthesis, crystal structure, and gas sorption studies of two neutral octahedral {M}-cages built from sulfonylcalix[4]arene tetranuclear clusters and triazine linkers

Two isostructural nanosized coordination cages of formula [M II 4 SO 2 TCA(μ 4 -OH 2 )] 6 TATB 8 · n S (M = Co or Ni, SO 2 TCA = sulfonylcalix[4]arene, TATB = 4,4′,4′′- s -triazine-2,4,6-triyl-tribenzoate trisanion, S are solvent molecules) were obtained following a three-components strategy, using two different synthetic methods, leading to face-panelled octahedral coordination cages. The compounds were thoroughly analysed from a structural point of view, and for M = Co, the adsorption properties were measured, revealing a high surface area (SA = 742 m 2 g −1 ) and a large CO 2 uptake for these types of compounds. Two isostructural nanosized coordination cages based on the use of sulfonylcalix[4]arene and triazine derivatives are described thoroughly from a structural point of view, and their sorption properties were measured.