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. 2017 Apr 4;7:612. doi: 10.1038/s41598-017-00574-1

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© The Author(s) 2017

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Schematic diagram for the ─NH₂-functionalized Re-MOF that converts CO₂ to CO under visible light. (a,b) Zr₆O₄(OH)₄(–CO₂)₁₂ secondary building units (SBUs) are combined with H₂BPDC, H₂ReTC and H₂BPDC-(NH₂)₂ linkers to form Re-MOF-(NH₂)(X%). The structure of Re-MOF-NH₂ (X%) is shown. Twelve-coordinated Zr-based metal clusters are interconnected by BPDC, ReTC and BPDC-(NH₂)₂ linkers in a face-centred cubic array. Atom labelling scheme: C, black; O, red; Zr, blue polyhedra; Re, yellow; Cl, green; H atoms are omitted for clarity. (c) A schematic diagram of the photocatalytic CO₂ conversion within Re-MOF-NH₂ (X%).