0000000001303166
AUTHOR
Malgorzata Ostrowska
showing 14 related works from this author
Cu(II), Ni(II) and Zn(II) mononuclear building blocks based on new polynucleating azomethine ligand : Synthesis and characterization
2017
Five new mononuclear complexes formed by the polynucleating ligand 2-[1-(3,5-dimethyl)pyrazolyl]-2-hydroxyimino-N′-[1-(2-pyridyl)ethylidene]acetohydrazide (HL): [Ni(L)(HL)]ClO4·2CH3OH (1), [Ni(L)2]·CH3OH (2), [Zn(L)(HL)]ClO4·2CH3OH (3), [Zn(L)2]·CH3OH (4) and [Cu(L)2]·CH3OH (5) were synthesized and characterized by elemental analysis, mass-spectrometry, IR-spectroscopy and X-ray analysis. The complexes reveal distorted octahedral N4O2 coordination arrangement formed by both protonated and deprotonated (1, 3) or two deprotonated ligand molecules (2, 4, 5). The presence of non-coordinated oxime and pyrazole groups resulted in the formation of extensive systems of hydrogen bonds in the crystal…
Exploring the Specificity of Rationally Designed Peptides Reconstituted from the Cell-Free Extract of Deinococcus radiodurans toward Mn(II) and Cu(II)
2020
A series of five rationally designed decapeptides [DEHGTAVMLK (DP1), THMVLAKGED (DP2), GTAVMLKDEH (Term-DEH), TMVLDEHAKG (Mid-DEH), and DEHGGGGDEH (Bis-DEH)] have been studied for their interactions with Cu(II) and Mn(II) ions. The peptides, constructed including the most prevalent amino acid content found in the cell-free extract of Deinococcus radiodurans (DR), play a fundamental role in the antioxidant mechanism related to its exceptional radioresistance. Mn(II) ions, in complex with these peptides, are found to be an essential ingredient for the DR protection kit. In this work, a detailed characterization of Cu(II) systems was included, because Cu(II)–peptide complexes have also shown r…
Zinc(II)—The Overlooked Éminence Grise of Chloroquine’s Fight against COVID-19?
2020
The authors would like to thank Agnieszka Michalczuk for providing us with her artistic vision of SARS-CoV-2.
Triplet of cysteines – Coordinational riddle?
2020
Polythiol binding of metal ions plays crucial role in the proper functioning of cysteine-rich proteins that are responsible for metal homeostasis and defending processes against metal toxicity (including heavy metals detoxification). The coordination properties of cysteine residues involved in specific sequencional patterns in proteins (like those present in e.g. metallothioneins) are interesting not only from a chemical point of view but may also lead to a better understanding of the purpose and allocation of metal ions in various biomolecules. In this study, the interaction of Zn2+, Cd2+ and Ni2+ ions with four peptides containing cysteine triplet motif were studied by potentiometric and …
Complex formation of copper(II), nickel(II) and zinc(II) with ethyl phosphonohydroxamic acid : solution speciation, synthesis and structural characte…
2019
The first example of a Cu(II) 12-MC-4 hydroxamic metallacrown containing an ethylphosphonate group as an additional donor function in the β-position with respect to the hydroxamic group is described. The solution equilibrium of ethylphosphonoacetohydroxamic acid (PAHEt) with Cu(II) was investigated in aqueous solution by a combination of potentiometry, mass spectrometry, UV-Vis and EPR spectroscopies, and isothermal titration calorimetry. A model containing mononuclear [CuL], [CuL2]2− and [CuL2H−1]3− and pentanuclear [Cu5(LH−1)4]2− species is proposed. The predominance of the [Cu5(LH−1)4]2− species in solution over the pH range 4–9 was confirmed by the signals present in the ESI-MS spectra,…
Complex formation of copper( ), nickel( ) and zinc( ) with ethylophosphonoacetohydroxamic acid: solution speciation, synthesis and structural charac…
2019
We present herein the thermodynamic and X-ray characterisation of a novel ethyl phosphonohydroxamic acid-based Cu( ) metallacrown, predominating in solution in a broad pH range.
CCDC 1534663: Experimental Crystal Structure Determination
2017
Related Article: Karolina Zdyb, Maxym O. Plutenko, Rostislav D. Lampeka, Matti Haukka, Malgorzata Ostrowska, Igor O. Fritsky, Elzbieta Gumienna-Kontecka|2017|Polyhedron|137|60|doi:10.1016/j.poly.2017.07.009
CCDC 1901331: Experimental Crystal Structure Determination
2019
Related Article: Malgorzata Ostrowska, Irina A. Golenya, Matti Haukka, Igor Fritsky, Elzbieta Gumienna-Kontecka|2019|New J.Chem.|43|10237|doi:10.1039/C9NJ01175G
CCDC 1534662: Experimental Crystal Structure Determination
2017
Related Article: Karolina Zdyb, Maxym O. Plutenko, Rostislav D. Lampeka, Matti Haukka, Malgorzata Ostrowska, Igor O. Fritsky, Elzbieta Gumienna-Kontecka|2017|Polyhedron|137|60|doi:10.1016/j.poly.2017.07.009
CCDC 1534661: Experimental Crystal Structure Determination
2017
Related Article: Karolina Zdyb, Maxym O. Plutenko, Rostislav D. Lampeka, Matti Haukka, Malgorzata Ostrowska, Igor O. Fritsky, Elzbieta Gumienna-Kontecka|2017|Polyhedron|137|60|doi:10.1016/j.poly.2017.07.009
CCDC 1534660: Experimental Crystal Structure Determination
2017
Related Article: Karolina Zdyb, Maxym O. Plutenko, Rostislav D. Lampeka, Matti Haukka, Malgorzata Ostrowska, Igor O. Fritsky, Elzbieta Gumienna-Kontecka|2017|Polyhedron|137|60|doi:10.1016/j.poly.2017.07.009
CCDC 1534664: Experimental Crystal Structure Determination
2017
Related Article: Karolina Zdyb, Maxym O. Plutenko, Rostislav D. Lampeka, Matti Haukka, Malgorzata Ostrowska, Igor O. Fritsky, Elzbieta Gumienna-Kontecka|2017|Polyhedron|137|60|doi:10.1016/j.poly.2017.07.009
CCDC 1901330: Experimental Crystal Structure Determination
2019
Related Article: Malgorzata Ostrowska, Irina A. Golenya, Matti Haukka, Igor Fritsky, Elzbieta Gumienna-Kontecka|2019|CSD Communication|||
CCDC 1534659: Experimental Crystal Structure Determination
2017
Related Article: Karolina Zdyb, Maxym O. Plutenko, Rostislav D. Lampeka, Matti Haukka, Malgorzata Ostrowska, Igor O. Fritsky, Elzbieta Gumienna-Kontecka|2017|Polyhedron|137|60|doi:10.1016/j.poly.2017.07.009