Structure and Nuclease Activity of Simple Dinuclear Metal Complexes:  Quantitative Dissection of the Role of Metal Ions

1999 ◽  
Vol 32 (6) ◽  
pp. 485-493 ◽  
Author(s):  
Nicholas H. Williams ◽  
Bryan Takasaki ◽  
Mark Wall ◽  
Jik Chin
Keyword(s):  
Metal Ions ◽  
Metal Complexes ◽  
Nuclease Activity ◽  
Dinuclear Metal Complexes

Synthesis of Some Novel Dinuclear Metal Complexes, Containing Both Square-Planar and Tetrahedral Metal Ions, by the Reactions of Coordinated Diamines with an α-Hydroxy Ketone

1985 ◽  
Vol 38 (9) ◽  
pp. 1319 ◽  
Author(s):  
TE MacDermott
Keyword(s):  
Metal Ions ◽  
Metal Complexes ◽  
Hydroxy Ketone ◽  
Square Planar ◽  
Dinuclear Metal Complexes

Reactions between tris (propane-1,3-diamine)nickel(II) salts and 3- hydroxy-3-methylbutan-2-one in the presence of zinc(II) or cadmium(II) halides yield a series of di -oxygen-bridged dinuclear products which contain the square-planar nickel(II) complex of a 12-membered ligand ring one of whose members is either a zinc(II) or cadmium(II) halide. These complexes are thermally very stable but may be hydrolysed by water to give a complex of the corresponding α- imino alcohol.

7-Methyl-6-furylpurine forms dinuclear metal complexes with N3,N9 coordination

2018 ◽  
Vol 73 (11) ◽  
pp. 813-817 ◽  
Author(s):  
Indranil Sinha ◽  
Lukas Heller ◽  
Jutta Kösters ◽  
Jens Müller
Keyword(s):  
Metal Ions ◽  
Metal Complexes ◽  
Metal Ion ◽  
Dinuclear Complexes ◽  
Purine Derivatives ◽  
Purine Derivative ◽  
Coordination Environment ◽  
Bridging Ligand ◽  
Dinuclear Metal Complexes ◽  
Argentophilic Interaction

AbstractTwo dinuclear metal complexes bearing the purine derivative 7-methyl-6-furylpurine (1b) as a ligand are reported. In [Ag2(1b)2(DMSO)2](ClO4)2·DMSO and [Cu2(1b)2(NO3)2], two bridging purine derivatives coordinate the two metal ions via their N3 and N9 positions. In the silver(I) complex, the coordination environment of each metal ion is completed by a DMSO ligand, whereas an additional nitrato ligand coordinates to each copper(I) ion. The intramolecular Ag···Ag distance of 3.1069(5) Å is in agreement with the presence of a weak argentophilic interaction, whereas the Cu···Cu distance of 2.9382(4) Å is too long to be indicative of a cuprophilic interaction. The compounds represent the first examples of dinuclear complexes comprising two N3,N9-bridging purine derivatives without any additional bridging ligand.

scholarly journals Intraparticulate speciation analysis of soft nanoparticulate metal complexes. The impact of electric condensation on the binding of Cd2+/Pb2+/Cu2+by humic acids

2016 ◽  
Vol 18 (15) ◽  
pp. 10049-10058 ◽  
Author(s):  
Raewyn M. Town ◽  
Herman P. van Leeuwen
Keyword(s):  
Humic Acid ◽  
Metal Ions ◽  
Metal Complexes ◽  
Humic Acids ◽  
Speciation Analysis ◽  
The Impact

The drastic role of electrostatics in the binding of metal ions by soft charged nanoparticulate humic acid complexants is demonstrated.

Poly-Xaa Sequences in Proteins - Biological Role and Interactions with Metal Ions: Chemical and Medical Aspects

2018 ◽  
Vol 25 (1) ◽  
pp. 22-48 ◽  
Author(s):  
Joanna Watly ◽  
Aleksandra Hecel ◽  
Paulina Kolkowska ◽  
Henryk Kozlowski ◽  
Magdalena Rowinska-Zyrek
Keyword(s):  
Amino Acid ◽  
Metal Ions ◽  
Metal Complexes ◽  
Metal Binding ◽  
Binding Sites ◽  
Single Amino Acid ◽  
High Quality ◽  
Function Relationship ◽  
Binding Structure

Background: The understanding of the bioinorganic and coordination chemistry of metalloproteins containing unusual poly-Xaa sequences, in which a single amino acid is repeated consecutively, is crucial for describing their metal binding-structure-function relationship, and therefore also crucial for understanding their medicinal potential. To the best of our knowledge, this is the first systematic review on metal complexes with polyXaa sequences. Methods: We performed a thorough search of high quality peer reviewed literature on poly-Xaa type of sequences in proteins, focusing on their biological importance and on their interactions with metal ions. Results: 228 papers were included in the review. More than 70% of them discussed the role of metal complexes with the studied types of sequences. In this work, we showed numerous medically important and chemically fascinating examples of possible ‘poly-Xaa' metal binding sequences. Conclusion: Poly-Xaa sequences, in which a single amino acid is repeated consecutively, are often not only tempting binding sites for metal ions, but very often, together with the bound metal, serve as structure determinants for entire proteins. This, in turn, can have consequences for the whole organism. Such sequences in bacterial metal chaperones can be a possible target for novel, antimicrobial therapeutics.

scholarly journals Biological Role of Cobalt(II), Copper(II) and Nickel(II) Metal Ions on the Antibacterial Properties of Some Nicotinoyl-Hydrazine Derived Compounds

1997 ◽  
Vol 4 (2) ◽  
pp. 69-74 ◽  
Author(s):  
Zahid H. Chohan ◽  
Syed K. A. Sherazi
Keyword(s):  
Metal Ions ◽  
Metal Complexes ◽  
Bacterial Species ◽  
Analytical Data ◽  
Antibacterial Properties ◽  
Biological Role

Several cobalt(II), copper(II) and nickel(II) complexes of nicotinoylhydrazine-derived compounds were prepared and characterised by physical, spectral and analytical data. These compounds and their complexes have proven to be antibacterial. The screening data show the metal complexes to be more potential/bactericidal than the uncomplexed compounds against one or more bacterial species.

Role of metal ions in development of specific properties of polymer metal complexes

1986 ◽  
Vol 4 (1) ◽  
pp. 233-244 ◽  
Author(s):  
S.S H. Rashidova ◽  
E. U. Urinov ◽  
S. G. Khodjaev
Keyword(s):  
Metal Ions ◽  
Metal Complexes ◽  
Polymer Metal
Sign in / Sign up

Export Citation Format

Share Document