Topological Difference
in 2D Layers Steers the Formation
of Rigid and Flexible 3D Supramolecular Isomers: Impact on the Adsorption
Properties
- Publication date
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Abstract
Starting with the same precursors, pyridine-2,3-dicarboxylate
(pyrdc)
and 4,4′-bipyridyl (bipy), two 3D porous coordination polymers,
{[Cu(bipy)<sub>0.5</sub>(pyrdc)]·3H<sub>2</sub>O} (<b>1</b>) and {[Cu(bipy)<sub>0.5</sub>(pyrdc)]·0.5bipy·3H<sub>2</sub>O} (<b>2</b>), have been synthesized by changing the solvent
system from MeOH/H<sub>2</sub>O to EtOH/H<sub>2</sub>O. Single-crystal
structure analysis revealed that <b>1</b> and <b>2</b> are supramolecular isomers with 3D pillared-layer structures having
1D channel systems. Isomer <b>1</b> has a flexible structure
and shows gated adsorption behavior,
while framework <b>2</b> has a rigid backbone and exhibits the
adsorption properties of typical microporous materials
