Immobilization of Sodium Ions on the Pore Surface of a Porous Coordination Polymer

A porous coordination polymer (PCP) with immobilization of sodium cations on the pore surface has been synthesized, by employing a bifunctional carboxylate/sulfonate ligand, and structurally characterized. The porous framework with 1D channels of the dimension of 4.9 × 4.9 Å2 shows high thermal stability (∼330 °C), affording Type I adsorption isotherms for CO2, acetone, and benzene. The chemical shift of 13C NMR and characteristic adsorption energy (βE0) of acetone adsorbed in this compound represent the Lewis acidity of this framework.