Porous Metal−Organic Truncated Octahedron Constructed from Paddle-Wheel Squares and Terthiophene Links

Abstract

A metal-organic truncated octahedron (termed MOP-28) has been constructed from six rigid square-shaped Cu2(CO2)4 paddle-wheel building units and twelve 2,2':5',2' '-terthiophene-5,5' '-dicarboxylate (TTDC) linkers. TTDC linker in the cis,cis conformation provides the critical 90 degrees linkage for this unique construction. The porous structure of MOP-28 is maintained even after the removal of guest species, as evidenced by this compound's nitrogen sorption isotherm of Type I characteristics and unprecedented surface area (Langmuir surface area 1100 m2/g, BET surface area 914 m2/g) among materials composed of discrete molecules.

Metal–Organic Frameworks: Opportunities for Catalysis

“…Some well-known examples of dinuclear and higher nuclearity metal sites in biological systems include: the diiron sites in methane monooxygenase, dicopper in cytochrome c oxidase, and tricopper oxidases. [47] By analogy, polynuclear clusters are found in the 0D coordination polymers, such as binuclear {Cu 2 } paddlewheel [6,48] units found in MOP-1 [49,50] and [Cu 3 (btc) 2 ] (HKUST-1; btc = benzene-1,3,5-tricarboxylate) or trinuclear units such as {Fe 3 O(CO 2 ) 6 } in MIL-88, [18] and IRMOP-51. [16] Thus, 0D MOFs have accessible biomimetic catalytic centers.…”

Retikuläre Chemie metall‐organischer Polyeder

“…[27] Der Cu-Schaufelradkomplex ist leicht verzerrt, kann aber einen mittleren Winkel h von 90.08 einnehmen. Die Schaufelräder sind durch 2,2':5',2''-Terthiophen-5,5''-dicarboxylat(ttdc)-Linker, die einen q-Winkel von 90.08 haben, verknüpft.…”

Synthesis, Crystal Structures, and Luminescent Properties of Noninterpenetrating (6,3) Type Network Lanthanide Metal–Organic Frameworks Assembled by a New Semirigid Bridging Ligand

“…[4] Recently, lanthanide MOFs have attracted more interest because of their interesting structural diversity [5] and special properties such as porosity, [6,7] nonlinear optics, [8] luminescence, [9] and magnetism, [10] as well as an intriguing variety of architectures and molecular topologies. [11] Thus, it is becoming increasingly evident that despite continuous endeavours to understand the molecular structure and topology of MOFs with lantha-form a 3D cage structure with 1D supramolecular channels along the c axis, in which chloroform and lattice water molecules are located to stabilize the structure.…”

“…Herein we designed and prepared a new semirigid bridging ligand incorporating an aromatic skeleton bearing two salicylamide arms, 2,5-dimethyl-1,4-bis[{(2Ј-benzylaminoformyl)phenoxy}methyl]benzene (L), which may provide a fascinating means to assembling unusual lanthanide MOFs possessing excellent luminescent properties, as salicylamide-derived ligands are generally efficient sensitizers of lanthanide luminescence. [16] As a result, a series of new lanthanide MOFs, [{Ln 2 (NO 3 ) 6 6 ] n [Ln = Pr (1), Nd (2), Sm (3), Eu (4), Gd (5), Tb (6), Dy (7), and Er (8)], were assembled by the reaction between the ligand and the lanthanide nitrates. Structural analyses of the complexes 3, 4, 6, and 8 reveal that the complexes possess 4f homometallic 2D noninterpenetrating (6,3) honeycomb topological networks with 1D supramolecular channels along the c axis located by the positions of chloroform and lattice water molecules.…”