Bottom-up construction of a superstructure in a porous uranium-organic crystal

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Science  12 May 2017:
Vol. 356, Issue 6338, pp. 624-627
DOI: 10.1126/science.aam7851
  • Fig. 1 The cuboctahedron building unit in NU-1301.

    (A) A cuboctahedron built from eight [UO2(RCOO)3] units and 12 bridging ligands. (B) Two cuboctahedra connected by sharing a single triangular face. (C) A pentagonal prism formed by five cuboctahedra and a hexagonal prism formed by six cuboctahedra. (D) Different views of the large cage of NU-1301 showing the MgCu2-like structure (green cage for Mg, gray cage for Cu).

  • Fig. 2. The arrangement of cuboctahedra into superstructures in NU-1301.

    (A) Cuboctahedron primary structure. (B) Pentagonal and hexagonal prismatic secondary structures. (C) Icosidodecahedron and rectified hexakaidecahedron tertiary structures, (D) Tetrahedron and diamond-topology quaternary structures. (E) Complex structure composed of quaternary structures.

  • Fig. 3 The nun of NU-1301 described by tiling using U atoms and ligand vertices.

    (A) The five different cages of NU-1301. (B) The large [1012.124] green tiles, each with four evenly spaced 12-vertex faces, are connected by [86.122] red tiles to form a diamondoid superstructure. (C) [1012] gray tiles are connected by [85.102] yellow tiles to form a tetrahedron superstructure. (D) Packing of the gray/yellow tetrahedra with the green/red structure in (A). (E) The gray/yellow tetrahedron at the center of the green/red structure is shown to fill nearly all of the available space. (F) The smallest [86] blue cage is formed by the voids of the superstructure in (E). (G) The blue tiles are arranged around each [85.102] yellow tile in a five-fold symmetric pattern.

  • Fig. 4 Porosity and crystallinity measurements of bulk NU-1301.

    (A) Ar adsorption/desorption isotherm at 87 K for NU-1301 showing the cages corresponding to the steps in the isotherm. (B) PXRD patterns of the simulated structure (black), as-synthesized NU-1301 (red), and SC-activated NU-1301a (blue).

Supplementary Materials

  • Bottom-up construction of a superstructure in a porous uranium-organic crystal

    Peng Li, Nicolaas A. Vermeulen, Christos D. Malliakas, Diego A. Gómez-Gualdrón, Ashlee J. Howarth, B. Layla Mehdi, Alice Dohnalkova, Nigel D. Browning, Michael O'Keeffe, Omar K. Farha

    Materials/Methods, Supplementary Text, Tables, Figures, and/or References

    Download Supplement
    • Materials and Methods
    • Figs. S1 to S17
    • Tables S1 to S3
    • Captions for movies S1 and S2
    • References

    Images, Video, and Other Media

    Movie S1
    A sample of HDTEA@NU-1301 sinking to the bottom of an immiscible mixture of hexanes (top) and water (bottom).
    Movie S2
    A sample of TMNA@NU-1301 suspended in the top phase of an immiscible mixture of hexanes (top) and water (bottom).

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