2. Articole
Permanent URI for this collectionhttps://msuir.usm.md/handle/123456789/46
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Item Sinteza, caracterizarea și cercetarea activității antioxidative a n(4)acetat de etil tiosemicarbazonelor 2-formil(2-acetil) piridinei [Articol](CEP USM, 2022-11-10) Rusnac, Anna; Garbuz, Olga; Shova, Sergiu; Gulea, AurelianItem Synthesis, characterization, antioxidant activity evaluation of 3d metals complexes with N(4)-((3)-ethyl benzoate) thiosemicarbazones of 2-formyl(2-acetyl, 2-benzoil)pyridine [Articol](CEP USM, 2022) Rusnac, Anna; Garbuz, Olga; Shova, Sergiu; Gulea, AurelianThe paper presents the synthesis of new coordination compounds of Cu(II), Mn(II), Fe(III) Co(III), Ni(II) and Zn(II) with N(4)-((3)-ethyl benzoate)thiosemicarbazones of 2-formyl pyridine derivatives obtained through the condensation of N(4)-((m)-ethyl benzoate) thiosemicarbazide with 2-pyridinecarboxaldehyde, 2-acetylpyridine and 2-benzoylpyridine. The characterization of new compounds was done by 1H NMR, 13C NMR, IR spectroscopy, conductivity and elemental analysis. In addition, the structures of the ligands (HL1,3) were determined by single-crystal X-ray diffraction. The effect of these complexes on antioxidant activity were studied and compared with those of free ligands. The best result was found to be on coordination compound [Zn(L1)Cl], with IC50 = 11.45 μM, it is better than the free ligand HL1, IC50 = 13.15 μM and is better than the substance Trolox, IC50 = 15.86 μM (it is a pronounced antioxidant taken as a control substance).Item Supramolecular assemblies of CU(II) systems based on thiosemicarbazone ligand [Articol](Academia de Ştiinţe a Moldovei, 2015) Palamarciuc, Tatiana; Stratulat, Elena; Shova, Sergiu; Pui, Aurel; Palamarciuc, OlegItem Synthesis, structure and magnetic properties of new binuclear copper(II) complexes with thiosemicarbazone ligands [Articol](Academia de Ştiinţe a Moldovei, 2015) Stratulat, Eugeniu; Shova, Sergiu; Clerac, Rodolphe; Palamarciuc, OlegItem Rational design of single molecule magnets with thiosemicarbazone ligands [Articol](Academia de Ştiinţe a Moldovei, 2015) Palamarciuc, Oleg; Secu, Mihail; Palamarciuc, Tatiana; Stratulat, Elena; Shova, Sergiu; Clerac, RodolpheItem Preparation of mixed-oxide materials from heterometallic coordination compounds [Articol](Academia de Ştiinţe a Moldovei, 2015) Bulimestru, Ion; Mentre, Olivier; Tancret, Nathalie; Cornei, Nicoleta; Shova, Sergiu; Popa, Nelea; Gulea, AurelianItem Synthesis, structural and spectral studies of Cu(II) and V(IV) complexes of a novel Schiff base derived from pyridoxal [Articol](Academia de Ştiinţe a Moldovei, 2012) Mezey, Reka-Stefana; Pahontu, Elena Mihaela; Ilies, D.; Shova, Sergiu; Gulea, Aurelian; Roşu, TudorItem Synthesis, characterization, crystal structures of nickel(II), palladium(II) and copper(II) complexes with 2-furaldehyde-4-phenylthiosemicarbazone [Articol](Academia de Ştiinţe a Moldovei, 2012) Ilies, D.; Pahontu, Elena Mihaela; Mezey, Reka-Stefana; Shova, Sergiu; Gulea, Aurelian; Roşu, TudorItem Heterometallic lanthanide(III)-bismuth(III) polyaminopolycarboxylate complexes: synthesis and crystal structure [Articol](Academia de Ştiinţe a Moldovei, 2012) Bulimestru, Ion; Popa, Nelea; Shova, Sergiu; Gulea, AurelianItem β-alaninato-μ3-oxotrinuclear iron(III) cluster as regulator of Spirulina Platensis biochemical composition: crystal structure and spectral characteristics [Articol](Academia de Ştiinţe a Moldovei, 2006) Lazarescu, Ana; Shova, Sergiu; Bulimaga, Valentina; Turta, Constantinβ-Alanine is known as a non-protein amino acid. The importance of this amino acid is that it is a precursor of vitamin B3 and dipeptide L-carnosine, both of which revealing neuroprotective and detoxificating effects on cytotoxic α, β-aldehydes [1-3]. These biological properties together with coordination ability of amino acid have prompted us to examine the product of β-alanine interaction with iron(III) salt with the purpose of its administratingin cultivation media of Spirulina platensis. The new μ3-oxotrinuclear coordination compound namely [Fe3O(β-Ala)6(H2O)3](NO3)7⋅3H2O (1) was synthesized using earlier described procedure [4] and slightly modified. The title compound has been studied by single crystal X-ray diffraction, IR and 57Fe Mössbauer spectroscopy. The complex 1 crystallizes in monoclinic system, P21/n space group, with following unit cell parameters: a = 11.5141(7), b = 12.0475(8) c = 34.9902(17) Å, β = 95.157(4)º. The three iron(III) ions are joint by the central oxygen (μ3-O2-) and six carboxylate moieties. The apical positions of each metal centers are occupied by water molecules, thereby completing the octahedral coordination sphere. The presence of amino acid ligands in protonated form determined the large charge of cation-complex (+7). Thus, complex 1 presents a typical μ3-oxotrinuclear molecular structure similar to that reported previously [4,5]. The 57Fe Mössbauer spectra (MS) at room temperature and 80K of this compound, consist of two peaks, fitted as one doublet, the parameters of which indicate the presence of iron(III) in high spin state (S=5/2) with quite symmetrical environment. The complex 1 was used as supplement in cultivation media of Spirulina platensis. In concentrations up to 30mg/l the administrated compound increases proportionally the productivity of microalgae and improves the biochemical composition of biomass.