Supramolecular Hydrogen-Bonded Frameworks from 6-Phosphonopyridine-2-carboxylic Acid and Transition Metal Ions

2005 ◽  
Vol 5 (3) ◽  
pp. 1263-1270 ◽  
Author(s):  
Deyuan Kong ◽  
Abraham Clearfield
Keyword(s):  
Carboxylic Acid ◽  
Transition Metal ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Hydrogen Bonded

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.

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