Drastic and subtle thermally and gas-induced transformations of pure 4-tert-butylcalix[4]arene†
Abstract
Thermally and gas-induced transformations of the well-known host compound 4-tert-butylcalix[4]arene result in mixed porous phases. The coexisting mixed porous phases of 4-tert-butylcalix[4]arene selectively absorb air components N2, O2 and CO2.