Siderophilin metal coordination. Difference ultraviolet spectroscopy of di-, tri-, and tetravalent metal ions with ethylenebis[(o-hydroxyphenyl)glycine]

Biochemistry ◽  
1981 ◽  
Vol 20 (24) ◽  
pp. 7033-7039 ◽  
Author(s):  
Vincent L. Pecoraro ◽  
Wesley R. Harris ◽  
Carl J. Carrano ◽  
Kenneth N. Raymond
Keyword(s):  
Metal Ions ◽  
Metal Coordination ◽  
Ultraviolet Spectroscopy

scholarly journals The structural chemistry of zinc(ii) and nickel(ii) dithiocarbamate complexes

2021 ◽  
Vol 19 (1) ◽  
pp. 974-986
Author(s):  
Tanzimjahan A. Saiyed ◽  
Jerry O. Adeyemi ◽  
Damian C. Onwudiwe
Keyword(s):  
Complex Formation ◽  
Metal Ions ◽  
Structural Properties ◽  
Binding Sites ◽  
Biological Systems ◽  
Structural Chemistry ◽  
Metal Coordination ◽  
Nickel Ions ◽  
Coordination Modes ◽  
Biomedical Fields

Abstract Dithiocarbamate complexes are of immense interest due to their diverse structural properties and extensive application in various areas. They possess two sulfur atoms that often act as the binding sites for metal coordination in a monodentate, bidentate, or anisodentate fashion. These different coordination modes enhance the possibility for complex formation and make them useful in different areas especially in biomedical fields. A synergy exists in the metal ions and dithiocarbamate moieties, which tends to exert better properties than the respective individual components of the complex. These improved properties have also been attributed to the presence of the C–S bonds. Zinc and nickel ions have been majorly found to bind to the dithiocarbamate in bidentate modes, and consequently different geometries have resulted from this interaction. The aim of this review is to present some studies on the synthesis, structural chemistry, and the relevance of zinc and nickel dithiocarbamates complexes especially in biological systems.

scholarly journals Synthesis and Characterization of Two New Coordination Polymers Constructed from Azobenzene-4, 4′-Dicarboxylic Acid with Zinc (Ii) and Cd (Ii) 2, 2′-Bipyridine

2018 ◽  
Vol 7 ◽  
pp. 39-42
Author(s):  
Pramod Kumar Yadav
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Dicarboxylic Acid ◽  
Coordination Polymers ◽  
Molecular Structures ◽  
Metal Coordination ◽  
Synthesis And Characterization ◽  
Metal Coordination Polymers

Two transition metal coordination polymers [Zn(4,4′-ADA)(bpy)]n (1) and [Cd(4,4′-ADA)(bpy)(H2O)2]n (2) have been assembled from azobenzene-4,4′- dicarboxylic acid (H2ADA) with the help of 2,2′-bipyridine (bpy) ligand. The different molecular structures for complexes 1 and 2 formed from the same ligand (H2ADA) reveals the fact that organic linkers display different coordination preferences at different metal ions.

scholarly journals Folding of unstructured peptoids and formation of hetero-bimetallic peptoid complexes upon side-chain-to-metal coordination

2019 ◽  
Vol 10 (2) ◽  
pp. 620-632 ◽  
Author(s):  
Maria Baskin ◽  
Hui Zhu ◽  
Zheng-Wang Qu ◽  
Jordan H. Chill ◽  
Stefan Grimme ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Coordination ◽  
Side Chain

Metal ions initiate peptoids helicity that lead to positive allosteric cooperativity.

scholarly journals Stepwise assembly of mixed-metal coordination cages containing both kinetically inert and kinetically labile metal ions: introduction of metal-centred redox and photophysical activity at specific sites

2015 ◽  
Vol 44 (41) ◽  
pp. 17939-17949 ◽  
Author(s):  
Ashley B. Wragg ◽  
Alexander J. Metherell ◽  
William Cullen ◽  
Michael D. Ward
Keyword(s):  
Metal Ions ◽  
The Other ◽  
Metal Coordination ◽  
Mixed Metal ◽  
Stepwise Manner ◽  
Coordination Cages ◽  
Stepwise Assembly

Heterometallic coordination cages containing Ru or Os at half of the sites, and Co or Cd at the other half, have been prepared in a stepwise manner.

Complexes of Dimethylaminophosphazenes with Metal Ions

1975 ◽  
Vol 53 (12) ◽  
pp. 1765-1774 ◽  
Author(s):  
H. P. Calhoun ◽  
N. L. Paddock ◽  
J. N. Wingfield
Keyword(s):  
Metal Ions ◽  
High Spin ◽  
Electronic Spectra ◽  
Molecular Structures ◽  
Metal Coordination ◽  
Ligand Field ◽  
Steric Interactions ◽  
Trigonal Bipyramidal ◽  
Ligand Field Parameters ◽  
Distorted Trigonal Bipyramidal

The preparation of complexes DDPN.2MCl2 (M = Mn, Fe, Co, Zn ), DDPN.M(NO3)2, (M = Mn, Co, Ni, Cu, Zn), (DDPN = N6P6(NMe2)12) ), and N9P9(NMe2)18.2CoCl2 is described. All the complexes of the hexamer are of the high spin type and contain the cations DDPNMX+ (X = Cl, NO3 ). Their infrared and electronic spectra show that their molecular structures are essentially the same as those established crystallographically for the chlorocations (M = Co, Cu ), in which, as a consequence of steric interactions, the metal has a distorted trigonal-bipyramidal environment. The complex with Cu(NO3)2 is exceptional in that the DDPNCu2+ ion is formed in ionizing solvents, with a change in the stereochemistry of the metal. Coordination localizes π-electrons in nitrogen, weakens the ring bonds, and strengthens the exocyclic P—N bonds, as expected theoretically. Approximate values of ligand field parameters of the Co(NO3)2 and Ni(NO3)2 complexes are similar to those of complexes formed by simple amines; the phosphazenes act as σ-donors, their acceptor levels not being used significantly.

scholarly journals Combining Coordination and Hydrogen Bonds to Develop Discrete Supramolecular Metalla-Assemblies

Chemistry ◽  
2020 ◽  
Vol 2 (2) ◽  
pp. 565-576 ◽  
Author(s):  
Bruno Therrien
Keyword(s):  
Hydrogen Bonds ◽  
Metal Ions ◽  
Metal Coordination ◽  
Supramolecular Systems ◽  
Supramolecular Materials ◽  
Hydrogen Bonded Systems ◽  
Different Levels ◽  
Hydrogen Bonded

In Nature, metal ions play critical roles at different levels, and they are often found in proteins. Therefore, metal ions are naturally incorporated in hydrogen-bonded systems. In addition, the combination of metal coordination and hydrogen bonds have been used extensively to develop supramolecular materials. However, despite this win-win combination between coordination and hydrogen bonds in many supramolecular systems, the same combination remains scarce in the field of coordination-driven self-assemblies. Indeed, as illustrated in this mini-review, only a few discrete supramolecular metalla-assemblies combining coordination and hydrogen bonds can be found in the literature, but that figure might change rapidly.

scholarly journals Microfluidic-like Fabrication of a Vanadium-Cured Bioadhesive by Mussels

2021 ◽  
Author(s):  
Tobias Priemel ◽  
Gurveer Palia ◽  
Frank Förste ◽  
Franziska Jehle ◽  
Ioanna Mantouvalou ◽  
...  
Keyword(s):  
Metal Ions ◽  
Formation Process ◽  
Role Model ◽  
Metal Coordination ◽  
Secretory Vesicles ◽  
Thread Formation ◽  
Cross Links ◽  
Metal Bonds ◽  
Established Role ◽  
Vanadium Ions

<p>To anchor in seashore habitats, mussels fabricate adhesive byssus fibers mechanically reinforced by protein-metal coordination mediated via 3,4-dihydroxyphenylalanine (DOPA) – providing a well-established role model for bio-inspired design of smart metallopolymers and underwater glues. However, currently, the mechanism by which metal ions are integrated as cross-links during byssus formation is completely unknown. Here, we investigated the byssus formation process, combining traditional and advanced methods to identify how and when metals are incorporated into the material. We discovered that mussels concentrate and store iron and vanadium ions in intracellular metal storage particles (MSPs) complexed with previously unknown catechol-based storage molecules. During thread formation, stockpiled secretory vesicles containing concentrated fluid proteins are mixed with MSPs within a complex microfluidic-like network of interconnected channels where they coalesce forming protein-metal bonds within the nascent byssus. These insights are important for bio-inspired materials design, but also from a biological and chemical perspective – the active accumulation and utilization of vanadium is extremely rare in nature.</p>

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