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Summary of the structure of RO-1, 2, and 3. (a) Coordination environments of the {M3} node. (b) Structure of the {PMo9V7O44} node. (c) 1D chain constructed from reduction clusters ({M3}) and oxidation cluster ({PMo9V7O44}). (d) Spatial arrangement and corresponding to simplify the diagram. All hydrogen atoms are omitted for clarity. Mo, cyan; M, green; V, yellow; P, pink; O, red; N, blue; C, gray.
