A5072157007- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Metal complexes synthesis and properties
- Crystal structures of chemical compounds
- Synthesis and biological activity
- Synthesis and Characterization of Heterocyclic Compounds
- Organometallic Compounds Synthesis and Characterization
- Magnetism in coordination complexes
- Inorganic and Organometallic Chemistry
- Metal-Organic Frameworks: Synthesis and Applications
- Lanthanide and Transition Metal Complexes
- Crystallography and molecular interactions
- Thermal and Kinetic Analysis
- Synthesis and Reactivity of Sulfur-Containing Compounds
- Metalloenzymes and iron-sulfur proteins
- Synthesis and Reactions of Organic Compounds
- Multicomponent Synthesis of Heterocycles
- Polyoxometalates: Synthesis and Applications
- Free Radicals and Antioxidants
- Chemical Thermodynamics and Molecular Structure
- Catalysis and Oxidation Reactions
- Vanadium and Halogenation Chemistry
- Insect and Pesticide Research
- Phenothiazines and Benzothiazines Synthesis and Activities
- Radioactive element chemistry and processing
Moldova State University
2016-2025
Institute of Chemistry
2024-2025
Nicolae Testemițanu State University of Medicine and Pharmacy
2021
ORCID
2020
Academy of Sciences of Moldova
2008-2016
ASM International
2016
École Polytechnique Fédérale de Lausanne
2008
Heteroelements and Coordination Chemistry Lab
2006-2007
1-phenyl-3-methyl-4-benzoyl-5-pyrazolone 4-ethyl-thiosemicarbazone (HL) and its copper(II), vanadium(V) nickel(II) complexes: [Cu(L)(Cl)]·C₂H₅OH·(1), [Cu(L)₂]·H₂O (2), [Cu(L)(Br)]·H₂O·CH₃OH (3), [Cu(L)(NO₃)]·2C₂H₅OH (4), [VO₂(L)]·2H₂O (5), [Ni(L)₂]·H₂O (6), were synthesized characterized. The ligand has been characterized by elemental analyses, IR, (1) H NMR (13) C spectroscopy. tridentate nature of the is evident from IR spectra. complexes have different physico-chemical techniques such as...
Thirty two new Cu(II), Ni(II) and Zn(II) complexes (1-32) with salicylidene thiosemicarbazones (H₂L¹-H₂L¹⁰) were synthesized. Salicylidene thiosemicarbazones, of general formula (X)N-NH-C(S)-NH(Y), prepared through the condensation reaction 2-hydroxybenzaldehyde its derivatives (X) thiosemicarbazide or 4-phenylthiosemicarbazide (Y = H, C6H5). The characterization formed compounds was done by ¹H-NMR, ¹³C-NMR, IR spectroscopy, elemental analysis, magnetochemical, thermoanalytical molar...
Hydrazone complexes of Cu(II), Co(II), Zn(II), Ni(II) and Pt(II) with N-isonicotinoyl-N′-(3-metoxy-2 hydroxybenzaldehyde)-hydrazone (HL) were synthesized characterized by different physico-chemical techniques including elemental thermal analysis, magnetic susceptibility measurements, molar electric conductivity, as well IR (infrared), 1H-NMR 13C-NMR (hydrogen carbon nuclear resonance, UV-Vis (ultraviolet-visible), FAB (fast atom bombardment), EPR (electron paramagnetic resonance), mass...
A novel Schiff base, ethyl 4-[(E)-(2-hydroxy-4-methoxyphenyl)methylene-amino]benzoate (HL), was prepared and structurally characterized on the basis of elemental analyses, 1H NMR, 13C UV-Vis IR spectral data. Six new copper(II) complexes, [Cu(L)(NO3)(H2O)2] (1), [Cu(L)2] (2), [Cu(L)(OAc)] (3), [Cu2 (L)2Cl2(H2O)4] (4), [Cu(L)(ClO4)(H2O)] (5) [Cu2(L2S)(ClO4)(H2O)]ClO4·H2O (6) have been synthesized. The characterization newly formed compounds done by IR, UV-Vis, EPR, FAB mass spectroscopy,...
New Cu(II), Pd(II) and Pt(II) complexes, (Cu(L)(H2O)2(OAc)) (1), (Cu(HL)(H2O)2(SO4)) (2), (Cu(L)(H2O)2(NO3)) (3), (Cu(L)(H2O)2(ClO4)) (4), (Cu(L)2(H2O)2) (5), (Pd(L)(OAc))H2O (6), (Pt(L)2) (7) were synthesized from 8-ethyl-2-hydroxytricyclo(7.3.1.02,7)tridecan-13-one thiosemicarbazone (HL). The ligand its metal complexes characterized by IR, 1H-NMR, 13C-NMR, UV-Vis, FAB, EPR, mass spectroscopy, elemental thermal analysis, magnetic susceptibility measurements molar electric conductivity. free...
The chelating behavior of the thiosemicarbazone derivatives 2-hydroxy-8-R-tricyclo[7.3.1.0.(2,7)]tridecane-13-one (where R = H, CH3, C6H5) towards Co(II), Ni(II) and Cu(II) has been investigated by elemental analysis, molar conductivity measurements, UV-VIS, IR, ESR spectroscopy thermal studies. It was deduced from experiments performed that ligands coordinate to metal ions in different ways--neutral bidentate or mononegative bidentate--depending on nature R. Also, if acetates are used...
A series of Cu(II), Co(II), Pd(II), Pt(II), Zn(II), Cd(II) and Fe(III) complexes were designed synthesized using Schiff base 1‐phenyl‐2,3‐dimethyl‐4‐( N ‐3‐formyl‐6‐methylchromone)‐3‐pyrazolin‐5‐one (HL). The new metal investigated various physicochemical techniques including elemental thermal analyses, molar electric conductivity magnetic susceptibility measurements, as well spectroscopic methods. Also, the crystal structures ligand HL Pd(II) complex determined single‐crystal X‐ray...
In this study, we evaluated the impact of supplementing honey bee feed with molybdenum-based compounds. Among a dozen dinuclear Mo(V) complexes, first selected most stable and non-toxic which were tested as food supplements in an extensive eight-year campaign involving more than 700 beehives across various environmental conditions Moldova, France, Greece USA. This unprecedented field revealed that few milligrams compounds Na-Mo2O4-EDTA or Li-Mo2O4-EDTA provided spring autumn, increased queen...
ABSTRACT [Mo V 2 O S ] 2+ ‐based thiosemicarbazone complexes are an interesting family of molecules, which can display various biological properties. However, in order to develop applications, it is necessary shape this type complex, polymer matrices for example. In article, we report the synthesis a series 16 composite materials corresponding incorporation [(Mo ) n (L 1–6 ( = 1, 2) bis‐thiosemicarbazones polyurethane matrix. These composites described as –thiosemicarbazone‐based...
The present paper describes the synthesis, characterization and in vitro biological evaluation screening of different classes (ammoniacates, dioximates, carboxylates, semi- thiosemicarbazidates) Co(II), Co(III), Cu(II), Ni(II), Mn(II), Zn(II) Fe(III) complexes. Schiff bases were obtained from reaction some salicyl aldehydes with, respectively, furoylhydrazine, benzoylhydrazine, semicarbazide, thiosemicarbazide S-methylthiosemicarbazide to give tridentate ligands containing ONO, ONS or ONN as...
2‐Hydroxybenzaldehyde‐4‐allyl‐S‐methylisothiosemicarbazone and Cu (II), Co (III), Fe (III) Cr complexes were synthesized characterized. The new obtained compounds investigated by elemental analysis, magnetic susceptibility measurements, molar electric conductivity, IR, 1 H NMR, 13 C UV–Vis spectroscopy. In addition, the structure of ligand six has been determined single‐crystal X‐ray diffraction analysis. atom in complex 3 is penta‐coordinated a distorted square–pyramidal coordination...
New zinc (II), copper nickel (II) and cobalt (III) complexes, [Zn (HL) 2 ]I (1) , [Cu (HL)Cl ] (2) (HL)Br (3) (HL)(H O) ](ClO 4 ) (4) [Ni ·H O (5) [Co(L) ]Cl (6) ]NO 3 (7) ]I·[Co(L) ](I (8) were obtained with 2‐formylpyridine 4‐allyl‐ S ‐methylisothiosemicarbazone ( HL ). The isothiosemicarbazone ligand was characterized by NMR 1 H 13 C), IR spectroscopy X‐ray diffraction. All the complexes elemental analysis, IR, UV–Vis, ESI‐MS spectroscopy, molar conductivity, magnetic susceptibility...
A series of zinc(II) ([Zn(H2O)(L)Cl] (1)), copper (II) ([Cu(L)Cl] (2), [Cu(L)Br] (3), [Cu2(L)2(CH3COO)2]·4H2O (4)), nickel(II) ([Ni(HL)2]Cl2·H2O (5)), and cobalt(III) ([Co(L)2]Cl (6)) complexes were obtained with 2-formylpyridine N4-allylthiosemicarbazone (HL). In addition another two thiosemicarbazones (3-formylpyridine (HLa) 4-formylpyridine (HLb)) have been obtained. The synthesized studied using 1H 13C NMR spectroscopy, IR X-ray diffraction analysis. composition structure elemental...
This paper deals with the synthesis, structural studies, and behavior in solution of unprecedented coordination complexes built by association a panel 14 representative thiosemicarbazone ligands cluster [Mo2O2S2]2+. These have been thoroughly characterized both solid state XRD NMR, respectively. In particular, HMBC 1H{15N} 1H DOSY NMR experiments bring important elements for understanding complexes' solution. studies demonstrate that playing on nature position various substituents strongly...
The six new copper(II) coordination compounds [Cu(HL1)Cl2] (1), [Cu(HL1)Br2] (2), [Cu(H2O)(L1)(CH3COO)]·1.75H2O (3), [Cu(HL2)Cl2] (4), [Cu(HL2)Br2] (5), [Cu(H2O)(L2)(CH3COO)] (6) were synthesized with 2-formyl- and 2-acetylpyridine N4,S-diallylisothiosemicarbazones (HL1 HL2). isothiosemicarbazones characterized by NMR, FTIR spectroscopy, X-ray crystallography ([H2L2]I). All elemental analysis, molar conductivity of their 1mM methanol solutions. Furthermore, the crystal structure complex 3...