Details

Autor(en) / Beteiligte

• Yang, Sihai
• Lin, Xiang
• Dailly, Anne
• Blake, Alexander J.
• Hubberstey, Peter
• Champness, Neil R.
• Schröder, Martin

Titel

Enhancement of H2 Adsorption in Coordination Framework Materials by Use of Ligand Curvature

Ist Teil von

• Chemistry : a European journal, 2009-05, Vol.15 (19), p.4829-4835

Ort / Verlag

Weinheim: WILEY‐VCH Verlag

Erscheinungsjahr

2009

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• Curvy ligands for H2 storage? Enhancement of H2 adsorption has been observed in coordination framework materials, an example of which is depicted, by the introduction of phenanthrene and 9,10‐dihydrophenanthrene groups into porous CuII–carboxylate framework materials of NbO topology. Solvothermal reaction of the ligands H4L110 ((2,7‐phenanthrenediyl)diisophthalic acid) and H4L111 ([2,7‐(9,10‐dihydrophenanthrenediyl)]diisophthalic acid) with Cu(NO3)2⋅2.5 H2O in a slightly acidified mixture of DMF/1,4‐dioxane/H2O afforded the solvated framework compounds [Cu2(L110)(H2O)2](DMF)7.5(H2O)5 (NOTT‐110) and [Cu2(L111)(H2O)2](DMF)7.5(H2O)5 (NOTT‐111), respectively. Crystal structure determinations confirmed that NOTT‐110 and NOTT‐111 have the same NbO framework structure, differing only at the 9 and 10 positions of the phenanthrene group. The BET surface areas for desolvated NOTT‐110 and NOTT‐111 were estimated to be 2960 and 2930 m2 g−1, respectively. Compared with their phenyl analogues, introduction of phenanthrene groups to these porous CuII–carboxylate framework materials leads to an enhancement of H2 adsorption. Thus, the H2 isotherms for desolvated NOTT‐110 and NOTT‐111 confirm 2.64 and 2.56 wt % total H2 uptake, respectively, at 1 bar and 78 K. NOTT‐110 shows a high total H2 storage capacity of 7.62 wt % at 55 bar and 77 K (8.5 wt % at saturation) with a total volumetric capacity of 46.8 g L−1 at 55 bar and 77 K. Curvy ligands for H2 storage? Enhancement of H2 adsorption has been observed in coordination framework materials, an example of which is depicted, by the introduction of phenanthrene and 9,10‐dihydrophenanthrene groups into porous CuII–carboxylate framework materials of NbO topology.