Browsing by Subject "metal-organic framework"

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    CO2 Adsorption Properties of a Ca(II)-Based Organophosphonium Coordination Material
    (2012-01) Ibarra, Ilich A.; Tan, Kristina E.; Lynch, Vincent M.; Humphrey, Simon M.; Ibarra, Ilich A.; Tan, Kristina E.; Lynch, Vincent M.; Humphrey, Simon M.
    PCM-14 is a dense coordination polymer formed from Ca(II) and an unusual organophosphonium ligand. The dehydrated framework contains 3-coordinate Ca(II) sites within catenated, chiral 3,3-connected nets. PCM-14 exhibits a stark CO2 sorption selectivity over H-2, N-2 and O-2. The maximum CO2 uptake was shown to be highly sensitive to the material pretreatment evacuation temperature.
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    Gas Sorption and Luminescence Properties of a Terbium(III)-Phosphine Oxide Coordination Material with Two-Dimensional Pore Topology
    (2012-03) Ibarra, Ilich A.; Hesterberg, Travis W.; Holliday, Bradley J.; Lynch, Vincent M.; Humphrey, Simon M.; Ibarra, Ilich A.; Hesterberg, Travis W.; Holliday, Bradley J.; Lynch, Vincent M.; Humphrey, Simon M.
    The structure, stability, gas sorption properties and luminescence behaviour of a new lanthanide-phosphine oxide coordination material are reported. The polymer PCM-15 is based on Tb(III) and tris(p-carboxylated) triphenylphosphine oxide and has a 5,5-connected net topology. It exhibits an infinite three-dimensional structure that incorporates an open, two-dimensional pore structure. The material is thermally robust and remains crystalline under high vacuum at 150 degrees C. When desolvated, the solid has a CO2 BET surface area of 1187 m(2) g(-1) and shows the highest reported uptake of both O-2 and H-2 at 77 K and 1 bar for a lanthanide-based coordination polymer. Isolated Tb(III) centres in the as-synthesized polymer exhibit moderate photoluminescence. However, upon removal of coordinated OH2 ligands, the luminescence intensity was found to approximately double; this process was reversible. Thus, the Tb(III) centre was used as a probe to detect directly the desolvation and resolvation of the polymer.