Divalent zinc and cadmium coordination polymers of a new flexible tetracarboxylate ligand: syntheses, crystal structures and properties.

A series of seven metal-organic frameworks, namely, {[Zn(4)(bptc)(2)(bpp)(2)].3.5H(2)O}(n) (1), {[Zn(2)(bptc)(bix)].

An unprecedented 2-D cluster polymer constructed from unique mixed-valence Cu(I)6Cu(II)6 subunits.

A new 2-D cluster-based polymer {[Cu(I)(6)Cu(II)(6)L(6)(H(2)O)(3)(CH(3)OH)(6)].5H(2)O.3CH(3)OH}(n) (2) (H(3)L = C(6)H(5)C(O)NHC(S)NHCH(2)COOH) containing unique mixed-valence [Cu(I)(6)Cu(II)(6)L(6)] subunits was synthesized by reaction of single crystals of [Ln(2)(H(2)L)(4)(Phen)(2)(NO(3))(2)] (Ln = Pr (1a), Nd (1b) or Ho (1c)) (Phen = 1,10-phenanthroline) with copper(II) acetate in aqueous DMF.

Controlled aggregation of multiple guanidinium ions through a hydrogen-bonded network assembly with deprotonated forms of Kemp's triacid.

A series of five complexes that incorporate the guanidinium ion and various deprotonated forms of Kemp's triacid (H(3)KTA) have been synthesized and characterized by single-crystal X-ray analysis. The complex [C(NH(2))(3)(+)].[H(2)KTA(-)] (1) exhibits a sinusoidal layer structure with a centrosymmetric pseudo-rosette motif composed of two ion pairs.

Observation of magnetic bistability in polymorphs of the [Ni(dmit)(2)](-) complexes.

Four ion-pair complexes of [Ni(dmit)(2)](-) with [NO(2)bzql](+) have been obtained, which belong to two kinds of polymorph forms, [NO(2)bzql][Ni(dmit)(2)] (1alpha and 1beta) and [NO(2)bzql][Ni(dmit)(2)].CH(3)COCH(3) (2alpha and 2beta) (where dmit = 2-thioxo-1,3-dithiole-4,5-dithiolate and [NO(2)bzql](+) = 1-(4-nitrobenzyl)quinolinium). Though 1alpha, 2alpha, and 2beta all show anionic dimerization structures at room temperature, they have different anionic and cationic arrangement fashions, which give rise to different magnetic behaviors for these polymorphs or pseudo-polymorphs.

Assembly of silver(I)-organic networks from flexible supramolecular synthons with pendant ethynide arms attached to a naphthyl skeleton.

Five new ligands bearing terminal ethynide moieties attached via pendant arms to a naphthyl skeleton have been used in the synthesis of eight silver(I) complexes. In these compounds, the invariable appearance of the mu 4 and mu 5 ligation modes of the ethynide moiety reaffirms the general utility of the silver-ethynide supramolecular synthons R-CC supersetAg n and Ag n subsetCC-R-CC supersetAg n ( n = 4, 5) in coordination network assembly, even when the R group is conformationally flexible. Besides the silver-ethynyl and silver-aromatic interactions, several unconventional intermolecular interactions (argentophilicity, anion-pi, C-H.

Ligand-to-metal ratio controlled assembly of nanoporous metal-organic frameworks.

Two bilayered metal-organic frameworks with nanoporous channels were synthesized at different ligand-to-metal ratios, which demonstrated an interesting crystal-to-crystal transformation property and a special fluorescent response to the different guest molecules included.

Coexistence of chiral hydrophilic and achiral hydrophobic channels in one multi-helical-array metal-organic framework incorporating helical water cluster chains.

A novel host-guest metal-organic compound with both chiral hydrophilic and achiral hydrophobic channels has been obtained through the reaction of Cd(II) ion and a versatile asymmetrical ligand of H(4)bptc (H(4)bptc = 1,1'-biphenyl-2,2',3,3'-tetracarboxylic acid) based on hydro(solvo)thermal reactions.

Interweaving of triple-helical and extended metal-O-metal single-helical chains with the same helix axis in a 3D metal-organic framework.

A novel 3D metal-organic framework [Cd2(m-bptc)(4,4'-bpy)(0.5)(H2O)4].H2O (1; m-H4bptc = 1,1'-biphenyl-2,3',3,4'-tetracarboxylic acid, 4,4'-bpy = 4,4'-bipyridine) with interweaving of triple- and single-helical chains has been obtained based on hydro(solvo)thermal reactions.

One dense and two open chiral metal-organic frameworks: crystal structures and physical properties.

Three 3D robust homochiral helical coordination polymers, [Cu(2,2',3,3'-H2odpa)(bpy)] (1), {[Ni4(2,2',3,3'-odpa)2(bpy)4(H2O)4].(H2O)16} (2), and {[Co4(2,2',3,3'-odpa)2(bpy)4(H2O)4].(H2O)14} (3), have been hydrothermally synthesized from a flexible ligand of 2,2',3,3'-odpda (2,2',3,3'-oxydiphthalic dianhydride).

Assemblies of a new flexible multicarboxylate ligand and d10 metal centers toward the construction of homochiral helical coordination polymers: structures, luminescence, and NLO-active properties.

Hydro(solvo)thermal reactions between a new flexible multicarboxylate ligand of 2,2',3,3'-oxydiphthalic acid (2,2',3,3'-H(4)ODPA) and M(NO(3))(2).xH(2)O (M = Zn, x = 6; M = Cd, x = 4) in the presence of 4,4'-bipyridine (bpy) afford two novel homochiral helical coordination polymers [[Zn(2)(2,2',3,3'-ODPA)(bpy)(H(2)O)(3)].(H(2)O)(2) for 1 and [Cd(2)(2,2',3,3'-ODPA)(bpy)(H(2)O)(3)].

Synthesis, crystal structure, and magnetic properties of ([Cu(oxbe)]Mn(H(2)O)[Cu(oxbe)(DMF)])(n).nDMF.nH(2)O: From dissymmetrical mononuclear entities to a 3D heterometallic supramolecular coordination polymer.

Self-assembly of the building block [Cu(oxbe)](-) with Mn(II) led to a novel coordination polymer ([Cu(oxbe)]Mn(H(2)O)[Cu(oxbe)(DMF)])n).nDMF.nH(2)O, where H(3)oxbe is a new dissymmetrical ligand N-benzoato-N'-(2-aminoethyl)oxamido and DMF = dimethylformamide.