Hydrothermal synthesis, crystal structure and photoluminescence of two 1D Zn(II) coordination polymers

Two new 1D Zn(II) coordination polymers, [Zn(Bript)(phen)]n (1) and [Zn(cca)(bimb)] (2) (H2Bript = 4-bromineisophthalic acid; phen = 1,10-phenanthroline; H2cca = 2-carboxycinnamic acid; bimb = 1,2-bis(imidazol-1′-yl)butane) have been synthesized by hydrothermal reactions and characterized by IR, elemental analysis and X-ray single-crystal analyses. In complex 1, Bript ligands adopt chelate-bridging coordination mode to link Zn(II) ions into a 1D helical ribbon. In complex 2, cca ligands and bimb ligands link Zn(II) ions into two kinds of macro-rings and the two kinds of macro-rings are arrayed alternately into the final 1D double-strand chain. Furtherly, the one-dimensional chains are assembled into three-dimensional networks by π−π stacking interactions. In addition, the photoluminescent properties of complexes 1 and 2 have also been investigated.