| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Fischer, Roland C.
Graz University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (36/36 displayed)
- 2024Synthesis and Characterization of Alkali Metal Hypersilyl Borates
- 2023Dinuclear doubly bridged phenoxido copper(II) complexes as efficient anticancer agentscitations
- 2023Silicon and Germanium Functionalized Perylene Diimides – Synthesis, Optoelectronic Properties, and their Application as Non-Fullerene Acceptors in Organic Solar Cellscitations
- 2023Synthesis and Characterization of 3-Aminopropyl-phenyl Germanescitations
- 2023Structure and magnetic characterization of some bicompartmental [N6O2] divalent metal(ii) complexes using bis(phenolato) ligands bearing two pendant bis(pyridyl) amine arms
- 2023Magnetostructural Properties of Some Doubly-Bridged Phenoxido Copper(II) Complexescitations
- 2023Copper(II) and zinc(II) complexes bridged by benzenoid aromatic oxocarbon and dicarboxylate dianionscitations
- 2021Synthesis, crystal structures, spectral, magnetic and thermal properties of 1-D polymeric dicyanamido-metal(II) complexescitations
- 2021Identification of potent anticancer copper(ii) complexes containing tripodal bis[2-ethyl-di(3,5-dialkyl-1H-pyrazol-1-yl)]amine moietycitations
- 2021Syntheses, structural characterization, and thermal behaviour of metal complexes with 3-aminopyridine as co-ligandscitations
- 2020Synthesis and characterization of zinc di(O-2,2-dimethylpentan-3-yl dithiocarbonates) bearing pyridine or tetramethylethylenediamine coligands and investigation of their thermal conversion mechanisms towards nanocrystalline zinc sulfidecitations
- 2020Polynuclear and coordination polymers of copper(II) complexes assembled by flexible polyamines and bridging rigid N-heterocyclic multicarboxylatescitations
- 2019Azido-cobalt(II) coordination polymers exhibiting slow magnetic relaxation and metamagnetic transitioncitations
- 2019Structure, DFT Calculations, and Magnetic Characterization of Coordination Polymers of Bridged Dicyanamido-Metal(II) Complexescitations
- 2019Synthesis and characterization of 1D coordination polymers of metal(II)-dicyanamido complexescitations
- 2019Thiocyanato-metal(II) and azido-cobalt(III) complexes with hydroxymethylpyridinescitations
- 2017Synthesis, structural characterization and magnetic properties of polymeric azido Mn(II) complexes based on methyl-pyridine-N-oxide co-ligandscitations
- 2017Synthesis, crystal structures, spectral and magnetic properties of 1-D polymeric dicyanamido-metal(II) complexescitations
- 2017Pyridyl and triazole ligands directing the assembling of zinc(II) into coordination polymers with different dimensionality through azides.citations
- 2016Synthesis, characterization and luminescent properties of polymeric cadmium(II) bridged-thiocyanato and mononuclear thiocyanato-zinc(II) complexes of pyridine-N-oxide derativescitations
- 2016Dinuclear metal(II)-acetato complexes based on bicompartmental 4-chlorophenolate: syntheses, structures, magnetic properties, DNA interactions and phosphodieser hydrolysiscitations
- 2016Synthesis and characterization of polymeric azido Zn(II) and Ni(II) complexes based on 3-hydroxypyridinecitations
- 2016Coordination polymers of azido and thiocyanato Cd(II) and Zn(II) complexes based on 2,6-luidine-N-oxide. Synthesis, characterization and luminescen propertiescitations
- 2016Metal(II) complexes of compartmental polynuclear schiff bases containing phenolate and alkoxy groups.citations
- 2016Synthesis, characterization and luminescence properties of zinc(II) and cadmium(II) pseudohalide complexes derived from quinoline-N-oxide.citations
- 2015Influence of co-ligands in synthesis, photoluminescence behavior and catalytic activities of zinc complexes of 2-((E)-((pyridin-2-yl)methylimino)methyl)phenol.citations
- 2015Magnetic and structural properties of dinuclear singly bridged-phenoxido metal(II) complexes.citations
- 2015Synthesis, characterization and luminescence properties of zinc(II) complexes of pseudohalides and nitrite derived from 4-azidopyridinecitations
- 2015Synthesis and characterization of three new 1-D polymeric [M2(4-azidopyridine)4(μ1,1-N3)2(μ1,3-N3)2]n (M = Ni, Co, Cd) complexes.citations
- 2015Five-coordinate metal(II) complexes based pyrazolyl ligands.citations
- 2015Synthesis and characterization of five new thiocyanato- and cyanato-metal(II) complexes with 4-azidopyridine as co-ligandcitations
- 2014Stable Silenolates and Brook-Type Silenes with Exocyclic Structurescitations
- 2014Photoinduced Brook-type Rearrangement of Acylcyclopolysilanescitations
- 2014Thermal aging of electrolytes used in lithium-ion batteries – An investigation of the impact of protic impurities and different housing materialscitations
- 2013Synthesis and Properties of Bridgehead-Functionalized Permethylbicyclo[2.2.2]octasilanescitations
- 2009Immobilization of biomolecules on soluble and insoluble polymers.
Places of action
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article
Dinuclear metal(II)-acetato complexes based on bicompartmental 4-chlorophenolate: syntheses, structures, magnetic properties, DNA interactions and phosphodieser hydrolysis
Abstract
A series of dinuclear metal(II)-acetato complexes: [Ni2(μ-LClO)(μ2-OAc)2](PF6)·3H2O (1), [Ni2(μ-LClO)(μ2-OAc)2](ClO4)·CH3COCH3 (2), [Cu2(μ-LClO)(μ2-OAc)(ClO4)](ClO4) (3), [Cu2(μ-LClO)(OAc)2](PF6)·H2O (4), [Zn2(μ-LClO)(μ2-OAc)2](PF6) (5) and [Mn2(LCl-O)(μ2-OAc)2](ClO4)·H2O (6), where LClO− = 2,6-bis[bis(2-pyridylmethyl)aminomethyl]-4-chlorophenolate, were synthesized. The complexes were structurally characterized by spectroscopic techniques and single crystal X-ray crystallography. Six-coordinate geometries with doubly bridged acetato ligands were found in Ni(II), Zn(II) and Mn(II) complexes 1, 2, 5 and 6, whereas with Cu(II) complexes a five-coordinate species was obtained with 4, and mixed five- and six-coordinate geometries with a doubly bridged dimetal core were observed in 3. The magnetic properties of complexes 1–4 and 6 were studied at variable temperatures and revealed weak to very weak antiferromagnetic interactions in 1, 2, 4 and 6 (J = −0.55 to −9.4 cm−1) and ferromagnetic coupling in 3 (J = 15.4 cm−1). These results are consistent with DFT calculations performed at the B3LYP/def2-TZVP(-f) level of theory. Under physiological conditions, the interaction of the dinculear complexes 1–5 with supercoiled plasmid ds-DNA did not show any pronounced nuclease activity, but Ni(II) complexes 1 and 2 revealed a strong ability to unwind the supercoiled conformation of ds-DNA. The mechanistic studies performed on the interaction of the Ni(II) complexes with DNA demonstrated the important impact of the nickel(II) ion in the unwinding process. In combination with the DNA study, the phosphatase activity of complexes 1, 3, and 5 was examined by the phosphodiester hydrolysis of bis(2,4-dinitrophenol)phosphate (BDNPP) in the pH range of 5.5–10.5 at 25 °C. The Michaelis–Menten kinetics performed at pH 7 and 10.7 showed that catalytic efficiencies kcat/KM (kcat = catalytic rate constant, KM = substrate binding constant) decrease in the order: Ni(II), 1 > Zn(II), 5 > Cu(II), 3. A similar trend was also observed with the turnover numbers at pH = 7. The results are discussed in relation to the coordination geometry and nature of the metal center as well as the steric environment imposed by the compartmental phenoxido ligand.