Journal ArticleDOI
Spectroscopic analysis of binary and ternary copper(ii) complexes formed by histidine and glutamic acid
TLDR
In this article, it is suggested that the histidinate ion adopts a histamine-like bonding mode giving rise to CuN3O chromophores in the metal plane.Abstract:
Ternary copper(II) complexes of the type [Cu(His)A] (HisH=L-histidine, A=glycinato, L-valinato, L-alaninato, L-threoninato, L-serinato, or L-asparaginato) and [Cu(Glu)B]n- (GluH2=L-glutamic acid, B=glycinato, L-alaninato, L-valinato (n=1) or an amino-acid with positively charged protonated side chain such as L-asparagine, L-lysine, or L-ornithine (n=0)) have been investigated in aqueous solution by means of ESR and absorption spectra. It is suggested that in the ternary species the histidinate ion adopts a histamine-like bonding mode giving rise to CuN3O chromophores in the metal plane. Coordination in the bis-(glycine)-like mode is detected in the Glu-containing species. The spectral results have been used to postulate plausible structures for the bis-(histidinato)copper(II) complexes.read more
Citations
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Journal ArticleDOI
Copper(II) complexation by D-glucosamine. Spectroscopic and potentiometric studies
Giovanni Micera,Salvatore Andrea Deiana,Alessandro Dessì,Patrick Decock,B. Dubois,Henryk Kozlowski +5 more
TL;DR: In this paper, the Cu(II) complex formation equilibria of D- glucosamine were studied in aqueous solution by potentiometric and spectroscopic (ESR, CD, absorption spectra) techniques.
Journal ArticleDOI
Solution chemistry of copper(II)-gentamicin complexes: relevance to metal-related aminoglycoside toxicity.
Wojciech G. Lesniak,Wesley R. Harris,Joslyn Yudenfreund Kravitz,Jochen Schacht,Vincent L. Pecoraro +4 more
TL;DR: The adverse effect to the inner ear of aminoglycosides, drugs widely administered for the treatment of serious infections, appears to result from the interaction of these drugs with Cu(II) or Fe(II)/Fe(III) ions, and copper(II)-gentamicin complexes might not exist under physiological conditions.
Journal ArticleDOI
An electron spin resonance study of coordination modes in the copper(II)-histamine and copper(II)-L-histidine systems in fluid aqueous solution
TL;DR: In this article, the copper-II-histamine and copper-l-histidine equilibrium systems were studied in fluid aqueous solution by ESR spectroscopy, and the isotropic ESR parameters (g-factors, hyperfine coupling constants and relaxation parameters) and the relative concentrations of the different species were optimized.
Journal ArticleDOI
Study of structural and dynamic characteristics of copper(II) amino acid complexes in solutions by combined EPR and NMR relaxation methods
Mikhail S. Bukharov,Valery G. Shtyrlin,Anvar S. Mukhtarov,Georgy Mamin,Siegfried Stapf,Carlos Mattea,Alexander A. Krutikov,Alexander N. Il'in,Nikita Yu. Serov +8 more
TL;DR: It was found that addition of a salt background has an influence on the cis-trans isomer equilibrium in favour of the formation of the cis isomer.
Journal ArticleDOI
Potentiometric and spectroscopic studies on the copper(II) complexes formed by oligopeptides containing histidine with a protection at the terminal amino group
TL;DR: In this paper, the involvement of the imidazole nitrogen in metal binding was proved in slightly acidic media, and the deprotonation and coordination of the amide nitrogen atoms from the carbamate or peptide CONH moieties occurred around pH 7.
References
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Journal ArticleDOI
The biochemistry of copper.
TL;DR: The biochemistry of copper is one book that the authors really recommend you to read, to get more solutions in solving this problem.
Journal ArticleDOI
The State of Copper in Human Serum: Evidence for an Amino Acid-bound Fraction
TL;DR: It is suggested that copper may also be present in serum in the form of mixed amino acid-copper complexes consisting of one atom of copper and two different amino acids.
Journal ArticleDOI
Studies on Absorption Spectra. I. Results of Calculations on the Spectra and Configuration of Copper(II) Ions.
Journal ArticleDOI
Binding of copper (II) to potentially tridentate amino acid ligands.
Related Papers (5)
Coordination modes of histidine. 4. Coordination structures in the copper(II)-L-histidine (1:2) system.
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