ChemInform Abstract:1H NMR Study of Purine and Pyrimidine Nucleoside 5′-Diphosphates. Extent of Macrochelate Formation in Monomeric Metal Ion Complexes and Promotion of Self-Stacking by Metal Ions.

1983 ◽  
Vol 14 (50) ◽  
Author(s):  
K. H. SCHELLER ◽  
H. SIEGEL
Keyword(s):  
Metal Ions ◽  
1H Nmr ◽  
Metal Ion ◽  
Pyrimidine Nucleoside ◽  
Metal Ion Complexes ◽  
Nmr Study

scholarly journals Synthesis and Spectral Analysis of Some Metal Ions Complexes with Mixed Ligands of Schiff Base and 1, 10-Phenanthroline

2017 ◽  
Vol 14 (1) ◽  
pp. 135-147
Author(s):  
Baghdad Science Journal
Keyword(s):  
Schiff Base ◽  
Metal Ions ◽  
Metal Complexes ◽  
Mass Spectrometer ◽  
Schiff Base Ligand ◽  
Metal Ion ◽  
Molecular Structures ◽  
Spectroscopic Techniques ◽  
Metal Ion Complexes ◽  
Free Schiff Base

The free Schiff base ligand (HL1) is prepared by being mixed with the co-ligand 1, 10-phenanthroline (L2). The product then is reacted with metal ions: (Cr+3, Fe+3, Co+2, Ni+2, Cu+2 and Cd+2) to get new metal ion complexes. The ligand is prepared and its metal ion complexes are characterized by physic-chemical spectroscopic techniques such as: FT-IR, UV-Vis, spectra, mass spectrometer, molar conductivity, magnetic moment, metal content, chloride content and microanalysis (C.H.N) techniques. The results show the formation of the free Schiff base ligand (HL1). The fragments of the prepared free Schiff base ligand are identified by the mass spectrometer technique. All the analysis of ligand and its metal complexes are in good agreement with the theoretical values indicating the purity of Schiff base ligand and the metal complexes. From the above data, the molecular structures for all the metal complexes are proposed to be octahedral

scholarly journals On the unsuspected role of multivalent metal ions on the charge storage of a metal oxide electrode in mild aqueous electrolytes

2019 ◽  
Vol 10 (38) ◽  
pp. 8752-8763 ◽  
Author(s):  
Yee-Seul Kim ◽  
Kenneth D. Harris ◽  
Benoît Limoges ◽  
Véronique Balland
Keyword(s):  
Metal Oxide ◽  
Metal Ions ◽  
Metal Ion ◽  
Charge Storage ◽  
Aqueous Electrolytes ◽  
Electron Charge ◽  
Oxide Electrode ◽  
Metal Ion Complexes ◽  
Multivalent Metal

The hidden role of hexaaquo metal ion complexes in the proton-coupled electron charge storage at a metal oxide electrode.

scholarly journals Interaction of Cu+ with cytosine and formation of i-motif-like C–M+–C complexes: alkali versus coinage metals

2016 ◽  
Vol 18 (10) ◽  
pp. 7269-7277 ◽  
Author(s):  
Juehan Gao ◽  
Giel Berden ◽  
M. T. Rodgers ◽  
Jos Oomens
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Alkali Metal Ions ◽  
Metal Ion Complexes ◽  
Coinage Metals

Dimeric metal ion complexes of cytosine C–M+–C display divergent coordination motifs for coinage versus alkali metal ions.

scholarly journals Synthesis and structural characterizations of tris(hydroxymethyl)aminomethane complexes with group IIA metals

2021 ◽  
Author(s):  
Lamia A. Albedair ◽  
Keyword(s):  
Metal Ions ◽  
1H Nmr ◽  
Chemical Reactions ◽  
Elemental Analysis ◽  
Analytical Methods ◽  
Metal Ion ◽  
Uv Visible ◽  
Structural Characterizations ◽  
Solid Complexes

Herein, this article aimed to investigate the tendency of tris(hydroxymethyl) aminomethane (THAM) to form stable complexes with group IIA metals. Four new colorless solid complexes of group IIA metals [Ba(II), Ca(II), Sr(II) and Mg(II)] with THAM were prepared and well characterized. The chemical reactions between group IIA metals and THAM were conducted by stoichiometry of 2:1 (Ligand: Metal ion) at 65 °C and pH of ~ 8.5. Under these conditions, the THAM molecule (C4H11NO3) was deprotonated and converted to the (C4H10NO3-; L-) chelate with the metal ions. The structures of these complexes were suggested by UV-visible, IR, Raman and 1H NMR spectroscopies and other physicochemical and analytical methods (elemental analysis, thermogravimetry, and SEM). The results shows that the general composition of the complexes obtained with Ba(II), Ca(II), Sr(II) and Mg(II) ions are [BaL2(H2O)2], [CaL2(H2O)2]·2H2O, [SrL2(H2O)2], and [MgL2(H2O)2]·4H2O, respectively, and in all complexes, the geometry was octahedral.

scholarly journals Overview of the Antioxidant and Anti-Inflammatory Activities of Selected Plant Compounds and Their Metal Ions Complexes

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4886
Author(s):  
Paulina Mucha ◽  
Anna Skoczyńska ◽  
Magdalena Małecka ◽  
Paweł Hikisz ◽  
Elzbieta Budzisz
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Structural Characteristics ◽  
Antimicrobial Activities ◽  
Comprehensive Overview ◽  
Metal Ion Complexes ◽  
Beneficial Effects ◽  
Antioxidant Defense Systems ◽  
Anti Inflammatory ◽  
Plant Compounds

Numerous plant compounds and their metal-ion complexes exert antioxidative, anti-inflammatory, anticancer, and other beneficial effects. This review highlights the different bioactivities of flavonoids, chromones, and coumarins and their metal-ions complexes due to different structural characteristics. In addition to insight into the most studied antioxidative properties of these compounds, the first part of the review provides a comprehensive overview of exogenous and endogenous sources of reactive oxygen and nitrogen species, oxidative stress-mediated damages of lipids and proteins, and on protective roles of antioxidant defense systems, including plant-derived antioxidants. Additionally, the review covers the anti-inflammatory and antimicrobial activities of flavonoids, chromones, coumarins and their metal-ion complexes which support its application in medicine, pharmacy, and cosmetology.

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