Three 2D/2D
→ 2D or 3D Coordination Polymers: Parallel Stacked, Interpenetration,
and Polycatenated
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Abstract
Three
fascinating coordination polymers, {[Zn<sub>2</sub>(TPPBDA)(HCO<sub>2</sub><sup>–</sup>)<sub>4</sub>]·2H<sub>2</sub>O}<sub><i>n</i></sub> (<b>1</b>), {[Zn(TPPBDA)<sub>1/2</sub>(4,4′-sdb)]·2H<sub>2</sub>O }<sub><i>n</i></sub> (<b>2</b>), and {[Zn(TPPBDA)<sub>1/2</sub>(oba)·2DMF·2H<sub>2</sub>O]}<sub><i>n</i></sub> (<b>3</b>), have been
successfully synthesized and characterized by the self-assembly of
the TPPDBA ligand as well as Zn<sup>2+</sup> metal salts, or in the
presence of carboxylate ligands (TPPDBA = <i>N</i>,<i>N</i>,<i>N</i>′,<i>N</i>′-tetrakis(4-(4-pyridine)-phenyl)
biphenyl-4,4′-diamine), 4,4′-H<sub>2</sub>sdb = 4,4′-sulfonyldibenzoate,
4,4′-H<sub>2</sub>oba = 4,4′-oxybis(benzoate), DMF = <i>N</i>,<i>N</i>-dimethylformamide). In complex <b>1</b>, the 2D ABAB parallel stacked network in which left- and
right-handed helical chains coexist and array alternately (2D<sub>chiral</sub>/2D<sub>chiral</sub> → 2D<sub>achiral</sub>) makes <b>1</b> give rise to a new interesting 2D interwoven network. Complex <b>2</b> exhibits a 2D + 2D → 2D parallel interpenetrated
network. For compound <b>3</b>, the polycatenation among the
2D layer further extends the 2D net into a 3D framework
