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A Three-Dimensional CdII Coordination Polymer Constructed From 1,1'-biphenyl-2,2',5,5'-tetracarboxylate and 1,4-bis(1H-imidazol-1-yl)benzene Ligands

A Three-Dimensional CdII Coordination Polymer Constructed From 1,1'-biphenyl-2,2',5,5'-tetracarboxylate and 1,4-bis(1H-imidazol-1-yl)benzene Ligands

Feng Su, Li-Ping Lu

Acta Crystallogr C Struct Chem. 2015 Jul;71(Pt 7):534-8.

PMID: 26146389

Abstract:

The title coordination polymer, poly[[aqua(μ5-1,1'-biphenyl-2,2',5,5'-tetracarboxylato)bis[μ2-1,4-bis(1H-imidazol-1-yl)benzene]dicadmium(II)] dihydrate], {[Cd2(C16H6O8)(C12H10N4)2(H2O)]·2H2O}n, was crystallized from a mixture of 1,1'-biphenyl-2,2',5,5'-tetracarboxylic acid (H4bpta), 1,4-bis(1H-imidazol-1-yl)benzene (1,4-bib) and cadmium nitrate in water-dimethylformamide. The crystal structure consists of two crystallographically independent Cd(II) cations, with one of the Cd(II) cations possessing a slightly distorted pentagonal bipyramidal geometry. The second Cd(II) centre is coordinated by carboxylate O atoms and imidazole N atoms from two separate 1,4-bib ligands, displaying a distorted octahedral CdN2O4 geometry. The completely deprotonated bpta(4-) ligand, exhibiting a new coordination mode, bridges five Cd(II) cations to form one-dimensional chains via μ3-η(1):η(2):η(1):η(2) and μ2-η(1):η(1):η(0):η(0) modes, and these are further linked by 1,4-bib ligands to form a three-dimensional framework with a (4(2).6(4))(4.6(2))(4(3).6(5).7(2)) topology. The structure of the coordination polymer is reinforced by intermolecular hydrogen bonding between carboxylate O atoms, aqua ligands and crystallization water molecules. The solid-state photoluminescence properties were investigated and the complex might be a candidate for a thermally stable and solvent-resistant blue fluorescent material.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS77271	4,4′-Bis(3-ethyl-N-carbazolyl)-1,1′-biphenyl			Price

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