title: Hydrogen sorption in functionalized metal-organic frameworks.
abstract: Five porous metal-organic frameworks based on linking zinc oxide clusters with benzene-1,4-dicarboxylate, naphthalene-2,6-dicarboxylate, 4,5,9,10-tetrahydropyrene-2,7-dicarboxylate, 2,3,5,6-tetramethylbenzene-1,4-dicarboxylate, or benzene-1,3,5-tris(4-benzoate) were synthesized in gram-scale quantities to measure their hydrogen uptake properties. Hydrogen adsorption isotherms measured at 77 K show a distinct dependence of uptake on the nature of the link. At 1 atm, the materials sorb between 4.2 and 9.3 molecules of H2 per formula unit. The results imply a trend in hydrogen uptake with the number of rings in the organic moiety.
authors.affiliation: Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, USA.
authors.forename: Jesse L C
authors.initials: JL
authors.lastname: Rowsell
authors.forename: Andrew R
authors.initials: AR
authors.lastname: Millward
authors.forename: Kyo Sung
authors.initials: KS
authors.lastname: Park
authors.forename: Omar M
authors.initials: OM
authors.lastname: Yaghi