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Issue 1, 2009
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Syntheses, structures and sorption properties of two framework-isomeric porous copper-coordination polymers

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Abstract

Solvothermal and solution reactions of a V-shaped organic ligand 4,4′-oxybis(benzoic acid) (H2oba) and Cu(NO3)2 yield two porous coordination polymers, namely [Cu(oba)(dmso)] (MCF-21) and [Cu2(oba)2(dmf)(C2H5OH)]·(dmf)2(H2O) (MCF-22·guest) (dmso = dimethyl sulfoxide, dmf = dimethylformamide), respectively. Single-crystal X-ray analyses reveal that the metal carboxylate backbones of MCF-21 and MCF-22·guest are framework-isomeric as two uninodal four-connected nets, i.e. a two-dimensional (2-D) 44 layer and a 3-fold interpenetrated lvt (4284) three-dimensional (3-D) network, respectively. After removing the solvent molecules, MCF-21 retains a rigid 2-D framework, but MCF-22·guest exhibits either rigid or dynamic behavior depending on the degree of desolvation, which is confirmed by powder X-ray diffraction and sorption isotherms. Meanwhile, the different sorption behavior of the framework-isomeric materials is elucidated by the discrepancies of their pore dimensions and framework rigidities.

Graphical abstract: Syntheses, structures and sorption properties of two framework-isomeric porous copper-coordination polymers

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Article information


Submitted
31 Jul 2008
Accepted
09 Oct 2008
First published
03 Nov 2008

CrystEngComm, 2009,11, 183-188
Article type
Paper

Syntheses, structures and sorption properties of two framework-isomeric porous copper-coordination polymers

D. Xue, J. Lin, J. Zhang and X. Chen, CrystEngComm, 2009, 11, 183
DOI: 10.1039/B813226G

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