Fig. 1: Properties of the hydrocarbons in cracking gases and separation mechanism of multi-functional ZU-33.

a The kinetic diameters and functional groups of the hydrocarbons in cracking gases. The rotational units of pyridine rings (b) and F anions (c). d The guest/temperature dual-responsive mechanism of multi-functional ZU-33. e Schematic illustration of the adaptive binding sites in ZU-33. Color code: F, red; Ge, cyan; Cu, light blue; C (in hydrocarbons), orange; H, withe; N, blue.