| Title
| - Design, Synthesis, Structure, and Gas (N2, Ar, CO2, CH4, andH2) Sorption Properties of Porous Metal-Organic Tetrahedraland Heterocuboidal Polyhedra
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| Abstract
| - A strategy based on assembling metal ions and organic carboxylate links has been applied forthe design and synthesis of a new class of porous, truncated tetrahedral and heterocuboidal polyhedra,whose pore size and functionality can be systematically varied. The synthesis of this series of metal-organic polyhedra (MOPs) employs sulfate-capped oxygen-centered iron-carboxylate trimers, Fe3O(CO2)3(SO4)3, as rigid nodes separated by linear (phenyl, biphenyl, terphenyl, and tetrahydropyrene) or trigonal(benzenetriphenyl) links to yield five highly crystalline polyhedra of general formula [NH2(CH3)2]8[Fe12O4(SO4)12(link)x(py)12]·G (x = 6 for linear or 4 for trigonal, py = pyridine, G = guests). In this series, the sizeof each polyhedron has been varied from 20.0 to 28.5 Å (on edge), and the corresponding pore diameterfrom 7.3 to 13.3 Å. Gas sorption isotherms were measured for three members of this series to revealsignificant uptake of gases (N2, Ar, CO2, H2, CH4) and benzene and exhibit Type I sorption behavior thatis indicative of permanent porosity. The apparent surface areas for these compounds range from 387 to480 m2/g.
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