Three 2D/2D → 2D or 3D Coordination Polymers: Parallel Stacked, Interpenetration, and Polycatenated

Three fascinating coordination polymers, {[Zn2(TPPBDA)(HCO2–)4]·2H2O}n (1), {[Zn(TPPBDA)1/2(4,4′-sdb)]·2H2O }n (2), and {[Zn(TPPBDA)1/2(oba)·2DMF·2H2O]}n (3), have been successfully synthesized and characterized by the self-assembly of the TPPDBA ligand as well as Zn2+ metal salts, or in the presence of carboxylate ligands (TPPDBA = N,N,N′,N′-tetrakis(4-(4-pyridine)-phenyl) biphenyl-4,4′-diamine), 4,4′-H2sdb = 4,4′-sulfonyldibenzoate, 4,4′-H2oba = 4,4′-oxybis(benzoate), DMF = N,N-dimethylformamide). In complex 1, the 2D ABAB parallel stacked network in which left- and right-handed helical chains coexist and array alternately (2Dchiral/2Dchiral → 2Dachiral) makes 1 give rise to a new interesting 2D interwoven network. Complex 2 exhibits a 2D + 2D → 2D parallel interpenetrated network. For compound 3, the polycatenation among the 2D layer further extends the 2D net into a 3D framework.