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A highly porous 4,4-paddlewheel-connected NbO-type metal-organic framework with a large gas-uptake capacity.
|Title||A highly porous 4,4-paddlewheel-connected NbO-type metal-organic framework with a large gas-uptake capacity.|
|Publication Type||Journal Article|
|Year of Publication||2013|
|Authors||Wang Z, Zheng B, Liu H, Yi P, Li X, Yu X, Yun R|
|Journal||Dalton transactions (Cambridge, England : 2003)|
|Date Published||2013 Aug 21|
A highly porous 4,4-paddlewheel-connected NbO-type metal-organic framework (HNUST-2, HNUST represents Hunan University of Science and Technology) has been designed and synthesized by self-assembling [Cu₂(COO)₄] SBUs with a nanosized tetracarboxylate ligand prolonged by alkyne groups, 5,5'-(naphthalene-1,4-diylbis(ethyne-2,1-diyl))diisophthalic acid (H₄NDED). HNUST-2 exhibits high structural stability, a porous non-interpenetration framework with open metal sites and excellent gas-uptake capacity. This MOF material possesses a high BET surface area of 2366 m² g⁻¹, a large unsaturated excess and total H₂ uptake of 4.57 wt% and 5. 20 wt% at 20 bar and 77 K, respectively. Meanwhile, HNUST-2 also exhibits an excellent adsorption capacity for CO₂ (18.07 mmol g⁻¹ at 20 bar and 298 K) and CH₄ (85.6 cm³ cm⁻³ at 20 bar and 298 K) with a high selectivity for CO₂ over N₂ (22.9) and CH₄ (4.9) at 298 K.
|Alternate Journal||Dalton Trans|