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Inorg Chem. 2012 Sep 3;51(17):9141-3. doi: 10.1021/ic300695v. Epub 2012 Aug 17.

Topological difference in 2D layers steers the formation of rigid and flexible 3D supramolecular isomers: impact on the adsorption properties.

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Molecular Materials Laboratory, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560 064, India.


Starting with the same precursors, pyridine-2,3-dicarboxylate (pyrdc) and 4,4'-bipyridyl (bipy), two 3D porous coordination polymers, {[Cu(bipy)(0.5)(pyrdc)]·3H(2)O} (1) and {[Cu(bipy)(0.5)(pyrdc)]·0.5bipy·3H(2)O} (2), have been synthesized by changing the solvent system from MeOH/H(2)O to EtOH/H(2)O. Single-crystal structure analysis revealed that 1 and 2 are supramolecular isomers with 3D pillared-layer structures having 1D channel systems. Isomer 1 has a flexible structure and shows gated adsorption behavior, while framework 2 has a rigid backbone and exhibits the adsorption properties of typical microporous materials.

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