A chiral zigzag chain with two chiral components and a 61 right-handed helical chain with three chiral components have been synthesized by using a flexible multidentate organic bridging ligand and changing the size of the central metal ion. The circular dichroism (CD) spectra and second-harmonic generation (SHG) efficiency measurements of these two compounds confirmed that they are of structural chirality in the bulk samples. The luminescence properties of the materials indicated that they may have potential applications as optical materials. The present study provides an effective method for preparing chiral coordination polymers with multiple chiral components and demonstrates that the ionic radius of a metal ion is a crucial factor for the construction of coordination polymers.

Metal-directed one-dimensional chiral zigzag chains and right-handed 61 helix with multiple chiral components: luminescence and NLO properties

1,1′-Biphenyl-2,2′,6,6′-tetracarboxylic acid (H4L) was reacted with uranyl nitrate, either alone or in the presence of additional metal cations (Ni2+, Cu2+, Dy3+) under (solvo)-hydrothermal conditions, giving six complexes which were characterized by their crystal structure and, in all but one case, their emission spectrum in the solid state. [Ni(bipy)3][UO2(H2L)(H2O)]2(NO3)2·3H2O (1) crystallizes as a one-dimensional (1D), ribbon-like coordination polymer, while the homometallic complex [(UO2)2(L)(H2O)3]·H2O·CH3CN (2) and the heterometallic complexes [UO2Cu(L)(H2O)2]·H2O (3), [UO2Cu(L)(H2O)]·H2O (4), and [(UO2)5Cu4(HL)6(bipy)4]·2H2O (5) display two-dimensional (2D) arrangements. Lastly, the uranyl–lanthanide heterometallic complex [(UO2)8Dy(HL)6(H2O)8](I)·8H2O (6) crystallizes as a three-dimensional (3D) framework. Although these assemblies adopt different topologies, the {42.6} linear motif found in 1 is discernible in the structures of 2, 5, and 6, in which the higher dimensionality arises from further...

Uranyl Ion Complexes with 1,1'-Biphenyl-2,2',6,6'-tetracarboxylic Acid: Structural and Spectroscopic Studies of One- to Three-Dimensional Assemblies.

A multifunctional three-dimensional uninodal eight-connected metal–organic framework based on pentanuclear cadmium subunits: New topology, fluorescent and NLO properties

A 3-D lanthanide coordination polymer, [La2(bta)1.5(H2O)4·2H2O] n (1) (H4bta = biphenyl-2,2′,6,6′-tetracarboxylic acid), has been hydrothermally synthesized and structurally characterized as an unprecedented trinodal (3,4,5)-connected (42.6).(44.62).(44.63.83) topology. The luminescence and thermal stability of 1 are also discussed.

A 3-D lanthanide coordination polymer constructed from biphenyl-2,2′,6,6′-tetracarboxylic acid: synthesis of a trinodal (3,4,5)-connected topology and luminescence

Two chiral mononuclear and one-dimensional cadmium(II) complexes constructed by (1R,2R)-N1,N2-bis(pyridinylmethyl)cyclohexane-1,2-diamine derivatives: Effect of positional isomerism

Two new nickel(II) complexes constructed by biphenyl-2,2′,6,6′-tetracarboxylic acid: A case study with 2,2′-bipyridine and 1H,1’H-2,2′-biimidazole

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Two new nickel(II) complexes constructed by biphenyl-2,2′,6,6′-tetracarboxylic acid: A case study with 2,2′-bipyridine and 1H,1’H-2,2′-biimidazole