Fig. 2
From: Anion-adaptive crystalline cationic material for 99TcO4− trapping
Crystal structure of SCP-IHEP-1. a The cationic supramolecular framework (insert: building blocks of the 1D metal–organic polyrotaxane chain, green macrocycles: cucurbit[8]uril (CB8) molecules; skeletons in orange: 4,4′-bipyridine (bpy); polyhedra in mint green: coordination spheres of copper ion; b the supramolecular assembly motif of 2bpy@CB8; c [Cu(bpy)2(H2O)4]2+ coordination motif; d nitrate-incorporated supramolecular framework of SCP-IHEP-1 (purple: O atom; blue: N atom); e NO3− in a tetrahedral coordination cavity; f proposed stepwise self-assembly process of SCP-IHEP-1 involving four different components
