Supramolecular Assembly of CeIV-Oxo Sulfate Torus with Transition Metal Countercations

M^IV molecular oxo-clusters of the f- and d-block (M=Zr, Hf, Ce, Th, U, Np, Pu) have been prolific in bottoms-up material design, catalysis, as well as understanding metal oxide assembly, dissolution and surface reactivity in nature and in synthesis. Here we introduce Ce₇₀, a new Ce^IV wheel-shaped oxo-cluster, [Ce^IV(OH)₃₆(O)₆₄(SO₄)₆₀(H₂O)₁₀]^4-, isostructural with prior-reported U₇₀. Like U₇₀, Ce₇₀ crystallizes into intricate frameworks with divalent transition metal counter-cations (TM^II), and also Ce^IV-monomer and sulfate addenda ions.