MOF for energy appl

50 m2g simple solvent evac 1900 m2g scd 470 m2g

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Unformatted text preview: vac.) 1,900 m2/g (scD) 470 m2/g (CHCl3 exch.) Other Examples with Supercritical CO2… Materials Challenges Controlling catenation Purity Retaining porosity Catentated versus non-catenated MOFs • nearly all “paddle-wheel” MOFs are catenated • but, for most applications, we desire non-catentated MOFS catenated non-catenated Examples of Catenated Paddlewheel MOFs • Zn2(dicarboxylate)2(dipyridyl) 1 4 7 2 3 5 8 6 9 Ma, et al. Inorg. Chem., 2005, 44, 4912-4914 A B C D Control over Catenation… Zn2 = Acc. Chem, Res. 2010, 43, 1053-1176 A) B) Mixed Results Redesigning the Tetratopic Strut Control over Catenation Metal-Organic Framework Materials for Energy Applications • • • • • Hydrogen storage Catalysis Chemical sensing Gas separations Light harvesting… J. Am. Chem. Soc., 2007, 129, 9604-9605. Langmuir, 2009; Inorg. Chem. 2008 Metal-Organic Framework Materials for Energy Applications Hydrogen storage. DOE-mandated goal: • 10 wt. percent • 100 bar or less • -30oC (243K) Metal-Organic Framework Materials for Energy Applications Hydrogen storage. DOE-mandated goal: • 10 wt. percent 5.5 % • 100 bar or less • -30oC (243K) Goals New Metal-Organic Frameworks Featuring: • High surface areas • Highly accessible H2 binding sites • Extraordinary heats of adsorption • High H2 storage capacity at ambient temperature Goals New Metal-Organic Frameworks Featuring: • High surface areas • Highly accessible H2 binding sites • Extraordinary heats of adsorption • High H2 storage capacity at ambient temperature Materials Design via Computational Modeling R. Q. Snurr and co-workers, Northwestern. Literature: High Surface Area MOFs R. Q. Snurr and co-workers, Northwestern. Target Coordination and Topology Cu-salt Why this topology: (a) high stability under ambient conditions (b) unsaturated coordination sites (Cu(II) sites) (c) impossibility of forming interpenetrated multi-network structures. cf. M. Schroder, et al. and H-C. Zhou, et al. Target Coordination and Topology Why this topology: (a) high stability under ambient conditions (b) unsaturated coordination sites (Cu(II) sites) (c) impossibility of forming interpenetrated multi-network struct...
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This document was uploaded on 02/02/2014.

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