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Reactions of a new bent dipyridyl-type ligand, 3,6-di(pyridin-4-yl)-9H-carbazole (dpc), with different Zn(ii) salts yielded four coordination polymers, namely [ZnCl2(dpc)] (1), [Zn4Cl8(dpc)4]·1.44H2O (2), [ZnF(dpc)2(H2O)]PF6·2H2O·2DMF (3) (DMF = N,N-dimethylformamide), and [Zn(dpc)2(SiF6)]·guest (4). By virtue of the bent coordination geometries of both the tetrahedral Zn(ii) ion and the dipyridyl ligand, as well as the termination effect of the Cl− counter-anion/ligand, 1 is a single-stranded helical chain. 2 is a supramolecular isomer of 1 containing the same bent ZnCl2(dpc) secondary building unit, but four of such units interconnect to form a molecular Möbius ring. More interestingly, the molecular Möbius rings in 2 mechanically interlock with their neighbours to form a curb chain. With weakly coordinating PF6− as a counter-anion, 3 is a cationic loop chain consisting of vertex-sharing rhombus molecular rings built from two metal ions and two organic ligands. 4 contains vertex-sharing loop chains similar to those in 3, but they are connected by SiF62− to form a neutral layered network possessing intralayer channels for gas adsorption. [ABSTRACT FROM AUTHOR]

A new coordination compound, [Cu(sphen)] (Hsphen = 2-sulfydryl-1,10-phenanthroline), as an analog of [Cu(ophen)] (Hophen = 1H-[1,10]phenanthrolin-2-one), is synthesized and characterized by single-crystal X-ray diffraction. While [Cu(ophen)] is a planar discrete complex showing strongπ–πstacking, [Cu(sphen)] is further connected by Cu–S bonds to form a one-dimensional coordination polymer. The bulk electrical conductivity of [Cu(sphen)] (5.0 × 10−3 S·cm−1) is ~3 orders of magnitude higher than that of [Cu(ophen)] (3.9 × 10−6 S·cm−1). [ABSTRACT FROM AUTHOR]