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LVO-Ethyl Maltol-Based Metallodrugs (L = Tridentate ONO Ligands): Hydrophobicity, Hydrolytic Stability, and Cytotoxicity via ROS-Mediated Apoptosis.
Inorg Chem
May 2023
Department of Chemistry, National Institute of Technology, Rourkela, 769008 Odisha, India.
Four new oxidovanadium [VOL(ema)] complexes (-) have been synthesized using tridentate binegative ONO donor ligands HL [HL: ()--(2-hydroxybenzylidene)furan-2-carbohydrazide; HL: ()--(4-(diethylamino)-2-hydroxybenzylidene)thiophene-2-carbohydrazide; HL: ()-2-(4-(diethylamino)-2-hydroxybenzylideneamino)-4-methylphenol; HL: ()-2-(3-ethoxy-2-hydroxybenzylideneamino)-4-methylphenol] and ethyl maltol (Hema) as a bidentate uninegative coligand and characterized by CHNS analysis, IR, UV-vis, NMR, and HR-ESI-MS methods. The structures of , , and are confirmed by single-crystal X-ray analysis. The hydrophobicity and hydrolytic stability of the complexes are tested using NMR and HR-ESI-MS and correlated with their observed biological activities.
View Article and Find Full Text PDFEngineered organotin(IV) and vanadium(V) derivatives with distinct coordination modes and luminescent properties for the efficient detection and quantification of permanganate ions.
Spectrochim Acta A Mol Biomol Spectrosc
June 2023
Department of Chemistry, Panjab University, Sector-14, Chandigarh 160014, India. Electronic address:
The distinction in coordination modes of metal complexes leads to their versatile structural features and unique properties. Here, we report two tetradentate Schiff base ligands (HL and HL) bearing NO donor sets, tactically selected to provide distinct coordination modes with different metal ions. The ligands were utilized to synthesize their organotin(IV) (1-4) and vanadium(V) (5) derivatives.
View Article and Find Full Text PDFMono Versus Dinuclear Vanadium(V) Complexes: Solvent Dependent Structural Versatility and Electro Syntheses of Mixed-Valence Oxovanadium(IV/V) Entities in Solution.
ACS Omega
April 2022
Inorganic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India.
Two mononuclear oxidovanadium(V) complexes type of [VO(L)(OMe)(MeOH)] (), [VO(L)(OMe)(MeOH)] () and two [VO] core of μ-oxidodioxidodivanadium(V) complexes (L)(O)V-O-V(O)(L) () and (L)(O)V-O-V(O)(L) () and two complexes [VO(L)(8-Hq)] () and [VO(L)(8-Hq)] () incorporating 8-hydroxyquinoline (8-hq) as co-ligand have been reported where L [()-'-(2-hydroxybenzylidene)cinnamohydrazide] and L [(2,')-'-(2-hydroxybenzylidene)-3-(naphthalen-1-yl)acrylohydrazide] are the dianionic forms of the conjugated keto-imine functionalized substituted hydrazone ligands. The μ-oxidodioxidodivanadium complexes are generated upon switching the solvent from methanol to acetonitrile. The X-ray analysis showed octahedral geometry for the mononuclear complexes , and but oxido-bridged dinuclear complexes and formed penta-coordinated square-pyramidal geometry about metal atoms.
View Article and Find Full Text PDFVO complexes with antibacterial quinolone ligands and their interaction with serum proteins.
Dalton Trans
February 2018
Istituto CNR di Chimica Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy.
Quinolone derivatives are among the most commonly prescribed antibacterials in the world and could also attract interest as organic ligands in the design of metal complexes with potential pharmacological activity. In this study, five compounds, belonging to the first (nalidixic acid or Hnal), second (ciprofloxacin or Hcip, and norfloxacin or Hnor) and third generation (levofloxacin or Hlev, and sparfloxacin or Hspar) of quinolones, were used as ligands to bind the VO ion. In aqueous solution, mono- and bis-chelated species were formed as a function of pH, with cis-[VOHL(HO)] and [VOHL], x = 0-2, being the major complexes at pH 7.
View Article and Find Full Text PDFBehavior of the potential antitumor V(IV)O complexes formed by flavonoid ligands. 1. Coordination modes and geometry in solution and at the physiological pH.
J Inorg Biochem
November 2014
Dipartimento di Chimica e Farmacia, and Centro Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per lo Studio della Biodiversità della Sardegna, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy. Electronic address:
The coordination modes and geometry assumed in solution by the potent antitumor oxidovanadium(IV) complexes formed by different flavonoids were studied by spectroscopic (Electron Paramagnetic Resonance, EPR) and computational (Density Functional Theory, DFT) methods. A series of bidentate flavonoid ligands (L) with increasing structural complexity was examined, which can involve (CO, O(-)) donors and formation of five- and six-membered chelate rings, or (O(-), O(-)) donors and five-membered chelate rings. The geometry corresponding to these coordination modes can be penta-coordinated, [VOL2], or cis-octahedral, cis-[VOL2(H2O)].
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