The influence of selected transition metal ions on the structure, thermal and microbiological properties of pyrazine-2-carboxylic acid

Polyhedron ◽  
2020 ◽  
Vol 175 ◽  
pp. 114173 ◽  
Author(s):  
Grzegorz Świderski ◽  
Sławomir Wojtulewski ◽  
Monika Kalinowska ◽  
Renata Świsłocka ◽  
Agnieszka Zofia Wilczewska ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Microbiological Properties

Metal Complexes of 6-Hydroxymethylpyridine-2-carboxylic Acid

1962 ◽  
Vol 15 (4) ◽  
pp. 786 ◽  
Author(s):  
RW Green ◽  
GKS Ooi
Keyword(s):  
Carboxylic Acid ◽  
Transition Metal ◽  
Metal Ions ◽  
Metal Complexes ◽  
Stability Constants ◽  
Steric Hindrance ◽  
Transition Metal Ions ◽  
Complexing Agent ◽  
Ph Titration ◽  
The Stability

Spectrophotometric and pH-titration methods have been used to determine the stability constants at 25 �C of complexes between transition metal ions and the anion of 6-hydroxymethylpyridine-2-carboxylic acid. This anion is found to be a weaker base and a weaker complexing agent than the pyridine-2-carboxylate ion. There is some evidence for steric hindrance of tris complexes.

scholarly journals 2D-Coordination polymers based on 1H-indazole-4-carboxylic acid and transition metal ions: magnetic, luminescence and biological properties

CrystEngComm ◽  
2020 ◽  
Vol 22 (30) ◽  
pp. 5086-5095
Author(s):  
Antonio A. García-Valdivia ◽  
Andoni Zabala-Lekuona ◽  
Gloria B. Ramírez-Rodríguez ◽  
José M. Delgado-López ◽  
Belén Fernández ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Transition Metal ◽  
Metal Ions ◽  
Coordination Polymers ◽  
Transition Metal Ions ◽  
Biological Properties

Five novel multifunctional coordination polymers (CPs) based on 1H-indazole-4-carboxylic acid are reported. These complexes, the first examples of CPs with this novel ligand, show interesting magnetic, luminescence and biological properties.

Anti-cancer and anti-inflammatory activities of a new family of coordination compounds based on divalent transition metal ions and indazole-3-carboxylic acid

2020 ◽  
pp. 111308
Author(s):  
Antonio A. García-Valdivia ◽  
Fatin Jannus ◽  
Amalia García-García ◽  
Duane Choquesillo-Lazarte ◽  
Belén Fernández ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Transition Metal ◽  
Metal Ions ◽  
Coordination Compounds ◽  
Transition Metal Ions ◽  
New Family ◽  
Anti Cancer ◽  
Anti Inflammatory

HREM Study of electron-induced surface radiation damage in ReO3

1991 ◽  
Vol 49 ◽  
pp. 636-637
Author(s):  
R. Ai ◽  
H.-J. Fan ◽  
L. D. Marks
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Oxides ◽  
Electron Irradiation ◽  
Transition Metal Oxides ◽  
Carbon Film ◽  
Transition Metal Ions ◽  
Surface Radiation ◽  
Valence Transition ◽  
Electron Microscopes

It has been known for a long time that electron irradiation induces damage in maximal valence transition metal oxides such as TiO2, V2O5, and WO3, of which transition metal ions have an empty d-shell. This type of damage is excited by electronic transition and can be explained by the Knoteck-Feibelman mechanism (K-F mechanism). Although the K-F mechanism predicts that no damage should occur in transition metal oxides of which the transition metal ions have a partially filled d-shell, namely submaximal valence transition metal oxides, our recent study on ReO3 shows that submaximal valence transition metal oxides undergo damage during electron irradiation.ReO3 has a nearly cubic structure and contains a single unit in its cell: a = 3.73 Å, and α = 89°34'. TEM specimens were prepared by depositing dry powders onto a holey carbon film supported on a copper grid. Specimens were examined in Hitachi H-9000 and UHV H-9000 electron microscopes both operated at 300 keV accelerating voltage. The electron beam flux was maintained at about 10 A/cm2 during the observation.

Synthesis, Spectral and Antimicrobial Investigation of 2-(Naphthalenel-ylamino)-2- Phenylacetonitrile and 1, 10-Phenanthroline with Five Divalent Transition Metal Ions

2019 ◽  
Vol 10 (01) ◽  
Author(s):  
Mohammed Al-Amery1 ◽  
Ashraf Saad Rasheed ◽  
Dina A. Najeeb
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Molar Conductance ◽  
Octahedral Geometry ◽  
Mixed Ligand ◽  
Gram Negative Bacteria ◽  
Magnetic Studies ◽  
Gram Positive Bacteria

Five new mixed ligand metal complexes have been synthesized by the reaction of divalent transition metal ions (Hg, Ni, Zn, Cu and Cd) with 2-(naphthalen-l-ylamino)-2-phenylacetonitrile (L1 ) and 1,10-phenanthroline (L2). The coordination likelihood of the two ligands toward metal ions has been suggested in the light of elemental analysis, UV-Vis spectra, FTIR, 1H-NMR, flam atomic absorption, molar conductance and magnetic studies. Results data suggest that the octahedral geometry for all the prepared complexes. Antibacterial examination of synthesized complexes in vitro was performed against four bacterias. Firstly, Gram-negative bacteria namely, Pseudomonas aerugin and Escherichia. Secondly, Gram-positive bacteria namely, Bacillus subtilis, Staphylococcuaurouss. Results data exhibit that the synthesized complexes exhibited more biological activity than tetracycline pharmaceutical.

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