Tetracarboxylato-bridged copper(II) complexes with ancillary N-chelating ligands: Syntheses, crystal structures and effect of aromatic compounds on the fluorescence property

Regulation of π⋯π stacking interactions between triimidazole luminophores and comprehensive emission quenching by coordination to Cu(ii)

Pioneering work demonstrating coordination preferences towards Cu(ii) of unexplored cyclic triimidazole-based luminophores and their favorable stacking patterns in coordination compounds.

Structural characterization of two solvates of a luminescent copper(II) bis-(pyridine)-substituted benzimidazole complex

Copper(II) complexes of benzimidazole are known to exhibit biological activity that makes them of inter-est for chemotherapeutic and other pharmaceutical uses. The complex bis-(acetato-κO){5,6-dimethyl-2-(pyridin-2-yl)-1-[(pyridin-2-yl)meth-yl]-1H-benzimidazole-κ2N2,N3}copper(II), has been prepared. The absorption spectrum has features attributed to intra-ligand and ligand-field transitions and the complex exhibits ligand-centered room-temperature luminescence in solution. The aceto-nitrile monosolvate, [Cu(C2H3O2)2(C20H18N4)]·C2H3N (1), and the ethanol hemisolvate, [Cu(C2H3O2)2(C20H18N4)]·0.5C2H6O (2), have been structurally characterized. Compound 2 has two copper(II) complexes in the asymmetric unit. In both 1 and 2, distorted square-planar N2O2 coordination geometries are observed and the Cu-N(Im) bond distance is slightly shorter than the Cu-N(py) bond distance. Inter-molecular π-π inter-actions are found in 1 and 2. A weak C-H⋯π inter-action is observed in 1.

Synthesis, crystal structure, DFT/TDDFT calculation, photophysical properties and DNA binding studies of morpholino moiety ligand based two Cu(ii) complexes in combination with carboxylates

Two Cu(II) compounds have been characterized by structure analyses and DFT/TD-DFT calculations. Both the complexes potentially bind with CT-DNA and corresponding binding constants are in the order of 10⁵ M⁻¹.

Synthesis and structural characterization of six Cu(ii)-based coordination polymers using the thermally tunable 1,2,3,4-cyclobutanetetracarboxylic acid

Unravelling the Cu(ii) coordination chemistry of a thermally tunable tetracarboxylate.

Study of temperature and ligand flexibility effects on coordination polymer formation from cyclobutanetetracarboxylic acid

Three novel coordination polymers (CPs) from rctt-H4Cbtc and 4,4’-bpe with Zn and Ni metal nodes have been synthesized. The CP derivates of Zn are an unusual example for the preparation of metastable phases involving temperature dependent and concomitant transformation.

[μ2-N (2),N (2')-Bis(3-meth-oxy-2-oxido-benzyl-idene)benzene-1,3-dicarbo-hydrazi-dato]bis-[pyridine-copper(II)]

In the centrosymmetric dinuclear title complex, [Cu₂(C₂₄H₁₈N₄O₆)(C₅H₅N)₂], the Cu^II ions is tetra­coordinated by two O-atoms and one N-donor of the bridging terephthalo­hydra­zonate ligand and by one pyridine N atom, resulting in a nearly square-planar N₂O₂ coordination geometry with the Cu^II ion 0.044 (2) Å out of the mean plane (r.m.s. deviation of 0.0675 Å) of the coordinating atoms.