Metal-organic frameworks based on double-bond-coupled di-isophthalate linkers with high hydrogen and methane uptakes
2008 | journal article. A publication with affiliation to the University of Göttingen.
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Metal-organic frameworks based on double-bond-coupled di-isophthalate linkers with high hydrogen and methane uptakes
Wang, X.; Ma, S.; Rauch, K.; Simmons, J. M.; Yuan, D.; Yildirim, T. & Cole, W. C. et al. (2008)
Chemistry of Materials, 20(9) pp. 3145-3152. DOI: https://doi.org/10.1021/cm800403d
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Details
- Authors
- Wang, X.; Ma, Shengqian; Rauch, Karsten; Simmons, Jason M.; Yuan, Daqian; Yildirim, Taner; Cole, William C.; Lopez, Joseph J.; de Meijere, Armin; Zhou, Hong-Cai
- Abstract
- Solvothermal reactions of Cu(NO3)(2) with azoxybenzene-3,3',5,5'-tetracarboxylic acid (H(4)aobtc) or trans-stilbene-3,3',5,5'-tetracarboxylic acid (H(4)sbtc) give rise to two isostructural microporous metal-organic frameworks, Cu-2(abtc)(H2O)(2)center dot 3DMA (PCN-10, abtc = azobenzene-3,3',5,5'-tetracarboxylate) and Cu-2(sbtc)(H2O)(2)center dot 3DMA (PCN-11, sbtc = trans-stilbeile-3,3',5,5'-tetracarboxylate), respectively. Both PCN-10 and PCN-11 possess significant enduring porosity with Langmuir surface areas of 1779 and 2442 m(2)/g (corresponding to BET Surface areas of 1407 or 1931 m(2)/g, respectively) and contain nanoscopic cages and coordinatively unsaturated metal centers. At 77 K, 760 Torr, the excess gravimetric (volumetric) hydrogen uptake of PCN-10 is 2.34 wt% (18.0 g/L) and that of PCN-11 can reach 2.55 wt% (19.1 g/L). Gas-adsorption studies also suggest that MOFs containing C=C double bonds are more favorable than those with N=N double bond in retaining enduring porosity after thermal activation, although N=N has slightly higher H-2 affinity. The excess gravimetric (volumetric) adsorption at 77 K saturates around 20 atm and reaches values of 4.33% (33.2 g/L) and 5.05% (37.8 g/L) for PCN-10 and PCN-11, respectively. In addition to its appreciable hydrogen uptake, PCN-11 has an excess methane uptake of 17 1 cm 3 (STP)/cm(3) at 298 K and 35 bar, approaching the DOE target of 180 v(STP)/v for methane storage at ambient temperature. Thus, PCN-11 represents one of the few materials that is applicable to both hydrogen and methane storage applications.
- Issue Date
- 2008
- Status
- published
- Publisher
- Amer Chemical Soc
- Journal
- Chemistry of Materials
- ISSN
- 0897-4756