New highly porous aluminium based metal-organic frameworks: Al(OH)(ndc) (ndc = 2,6-naphthalene dicarboxylate) and Al(OH)(bpdc) (bpdc = 4,4′-biphenyl dicarboxylate)

✍ Scribed by Irena Senkovska; Frank Hoffmann; Michael Fröba; Juergen Getzschmann; Winfried Böhlmann; Stefan Kaskel

• Book ID: 104057393
• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 510 KB
• Volume: 122
• Category: Article
• ISSN: 1387-1811
• DOI: 10.1016/j.micromeso.2009.02.020

✦ Synopsis

Two aluminium based metal-organic frameworks were synthesized using a solvothermal route. Using N,N-dimethylformamide as a solvent, a new porous modification Al(OH)(ndc) (ndc = 2,6-naphthalene dicarboxylate (DUT-4, DUT = Dresden University of Technology) of a non-porous MIL-69 was received. The structure consists of chains built of aluminium coordination octahedra bridged by ndc linkers. After removal of the solvent molecules, the material has a specific pore volume of 0.68 cm 3 g À1 . The excess hydrogen saturation value for this compound is 2.1 wt.% (V ad,STP (H 2 ) = 247 cm 3 g À1 ) reached at 30 bar and À196 °C. Furthermore, a new isoreticular compound Al(OH)(bpdc) (DUT-5) was synthesized in DMF using 4,4 0 -biphenyldicarboxylate (bpdc) instead of ndc as linker. This compound has a high permanent porosity and a specific pore volume of 0.81 cm 3 g À1 . The maximum hydrogen excess adsorption is 3.3 wt.% (V ad,STP (H 2 ) = 381 cm 3 g À1 ) at 40 bar and À196 °C.