Fig. 1: Main structures.
From: A robust Th-azole framework for highly efficient purification of C2H4 from a C2H4/C2H2/C2H6 mixture

a Ligand TBA, including carboxylic acid donor (O-donor) and tetrazole donor (N-donor), b inner core Th6-cluster drawn alone for clarity (Th6O8), c unit cell structure in crystal Azole-Th-1, d, e two types of cages, including super tetrahedron cage d and super octahedron cage e. Where, Th-light blue ball b and polyhedron style c–e with purple color, O-red ball, C-gray ball, N-blue ball, and H-white ball.