Porous Triphenylbenzene-Based Bicyclooxacalixarene Cage for Selective Adsorption of CO₂/N₂

A bicyclooxacalixarene cage with triangular prism structure was synthesized by a one-pot S_NAr reaction. The structure of the oxacalixarene cage <b>1</b> was characterized by NMR, MS spectra, and X-ray crystal structure analyses. In the solid state, the molecular cage was assembled into an interlaced porous network structure. Gas adsorption studies indicated that cage <b>1</b> exhibited high CO₂/N₂ selectivity of 106