2. Articole

Permanent URI for this collectionhttps://msuir.usm.md/handle/123456789/46

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Author: search.filters.author.Balan, GretaSubject: search.filters.subject.coordination compounds

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    Synthesis, Structure, and Biological Activity of Copper(II), Nickel(II), Cobalt(III), and Iron(III) Coordination Compounds with 2-{2-[(Prop-2-en-1-yl)carbamothioyl]hydrazinylidene}propanoic Acid [Articol]
    (2020) Gulea, Aurelian; Graur, Vasilii; Diurici, E.; Ulchina, Ianina; Bouroș, Pavlina; Balan, Greta; Burduniuc, Olga; Țapcov, Victor; Rudic, Valeriu
    2-Oxopropanoic acid reacts in ethanol with N-(prop-2-en-1-yl)hydrazinecarbothioamide in a 1 : 1 mole ratio to form thiosemicarbazone H2L. Coordination compounds Cu(HL)X [X = Cl–, Br–, NO3–], Cu(H2O)(L), Ni(HL)2, Co(HL)2X [X = Cl–, Br–], and Fe(HL)2X [X = NO3–, Br–] are formed in the reactions of H2L with copper(II), nickel(II), cobalt(II), and iron(III) salts. The reactions of Cu(H2O)(L) with imidazole (Im) and 3,4-dimethylpyridine (3,4-Lut) result in mixed-ligand complexes Cu(A)(L) [A = Im, 3,4-Lut]. The structures of two copper complexes were determined by single crystal X-ray diffraction analysis. The synthesized complexes exhibit selective antimicrobial and antifungal activity in the concentration range of 15.62–1000 μg/mL. The introduction of amines into the inner sphere of copper complexes leads to an increase in the antimicrobial activity.
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    Synthesis, Structure and Biological Activity of Coordination Compounds of Copper, Nickel, Cobalt, and Iron with Ethyl N'-(2-Hydroxybenzylidene)-N-prop-2-en-1-ylcarbamohydrazonothioate [Articol]
    (2020) Gulea, Aurelian; Usataia, Irina; Graur, Vasilii; Ciumacov, Iurie; Petrenko, Peter; Balan, Greta; Burduniuc, Olga; Țapcov, Victor; Rudic, Valeriu
    N-(Prop-2-en-1-yl)hydrazonocarbothioamide reacts with iodoethane in methanol with further addition of 2-hydroxybenzaldehyde to form hydroiodide of carbamohydrazonothioate (HL·HI). The coordination compounds were obtained by interaction of HL or HL·HI with copper, nickel, cobalt and iron salts CuLХ·nH2O [X = Cl–, Br–, NO3–; n = 0–1], Ni(L)2·HI·CH3OH, Сo(L)2X [X = I–, NO3–] and Fe(L)2NO3. The structures of three complexes were established by single crystal X-ray analysis. The synthesized complexes exhibit selective antimicrobial and antifungal activity against a series of standard microorganisms and fungi in the concentration range of 30–500 μg/mL. In addition, nickel and iron complexes selectively inhibit the growth and proliferation of cancer cells and do not adversely affect normal cells.
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    Synthesis, Structure, and Biological Activity of Copper and Cobalt Coordination Compounds with Substituted 2-(2-Hydroxybenzylidene)-N-(prop-2-en-1-yl) hydrazinecarbothioamides [Articol]
    (2019) Gulea, Aurelian; Graur, Vasilii; Ciumacov, Iurie; Petrenko, Peter A.; Balan, Greta; Burduniuc, Olga; Țapcov, Victor; Rudic, Valeriu
    The reaction of N-(prop-2-en-1-yl)hydrazinecarbothioamide with substituted 2-hydroxybenzaldehydes afforded the corresponding Schiff bases which were used as ligands to obtain copper and cobalt coordination compounds Cu(NL1–6)X · n H2O (X = Cl−, NO3−; n = 0–3), Co(HL2)2NO3, and Co(NL6)2Cl. The structure of the isolated complexes was determined by NMR spectroscopy and X-ray analysis. The complexes were tested for antimicrobial and antifungal activity against S. aureus, E. coli, and yeast-like fungi. Inhibitory effect of the initial thioamides and their complexes against human myeloid leukemia HL-60 cancer cell line was also studied.
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    Sinteza combinațiilor coordinative cu unele metale 3d în baza N(4)-(4-benzoat de etil) tiosemicarbazone ale derivaților aldehidei salicilice. proprietăți antimicrobiene, antifungice și antioxidative [Articol]
    (CEP USM, 2021) Rusnac, Anna; Țurcanu, Nina; Burduniuc, Olga; Balan, Greta; Garbuz, Olga; Gulea, Aurelian
    În lucrare este descrisă sinteza a 4 substanțe organice noi N(4)-(4-benzoat de etil) tiosemicarbazone ale derivaților aldehidei salicilice și a 29 combinații coordinative ale Cu(II), Ni(II), Zn(II) și Co(III). Structurile substanțelor sintetizate au fost confirmate cu ajutorul spectroscopiei IR și RMN, analizei elementale, magnetochimiei și, în cazul [Ni(L2) DMF]·DMF, difracției cu raze X. Studiul activității antimicrobiene s-a dovedit a fi în limita concentrației 0,125-0,500 mg/mL, iar activitate antifungică a înregistrat cel mai bun rezultat pe Cryptococcus neoformans la complexul {Ni(HL1)Cl}•C2H5OH•3H2O, unde CMI=0,016 mg/mL, fiind mai activ decât substanța martor Nistatina. Cele mai bune rezultate ale testului ABTS au fost înregistrate la ligandul H2L3(7) și la complexul {Ni(HL3) NO3}•H2O (7.8), care la concentrația 100 µM inhibă 54,4% din radicali ABTS•+.
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    Sinteza și proprietățile antibacteriene și antifungice ale compușilor coordinativi ai Fe(III) cu 4-ciclohexiltiosemicarbazona 4-benzoil-3-metil-1-fenil-2-pirazolin-5-onă [Articol]
    (CEP USM, 2020) Rusnac, Roman; Bîrca, Maria; Cotovaia, Aliona; Balan, Greta; Burduniuc, Olga; Gulea, Aurelian; Șova, Sergiu
    În lucrare este relatată metoda de sinteză a trei combinații coordinative noi ale Fe(III) cu ciclohexiltiosemicarbazona 4-benzoil-3-metil-1-fenil-2-pirazolin- 5-onă. Activitatea antimicrobiană a compușilor studiați este moderată. Compusul coordinativ [Fe(HL)2]NO3·H2O a demonstrat cea mai bună activitate față de tulpina de fungi Cryptococcus neoformans. Prin urmare, activitatea acestui compus este de 36 de ori mai bună comparativ cu nistatina; de 18 și 2 ori mai bună decât miconasolul și, respectiv , fluconazolul, preparte utilizate actualmente în profilaxia și tratamentul infecțiilor cauzate de aceste microorganisme.