Sub-ppt detection limits for copper ions with Gly-Gly-His modified electrodes

Yang, Wenrong; Jaramillo, David; Gooding, J. Justin; Hibbert, David Brynn; Zhang, Rui; Willett, Gary D.; Fisher, Karen R.

doi:10.1039/b106730n

Cited by 175 publications

(127 citation statements)

References 15 publications

(24 reference statements)

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“…Many methods to detect copper ions are available, including the use of electrochemistry, 5 atomic absorption spectroscopy, 6 and inductively coupled plasma mass spectroscopy. 5 However, all these methods involve instrumentation which may be impractical for in-field work.…”

Section: Introductionmentioning

confidence: 99%

A novel route to copper(ii) detection using ‘click’ chemistry-induced aggregation of gold nanoparticles

Hua

Zhang

Almeida

et al. 2012

Analyst

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. (2012). A novel route to copper(ii) detection using 'click' chemistry-induced aggregation of gold nanoparticles. The Analyst, 137 (1), 82-86. A novel route to copper(ii) detection using ' click' chemistry-induced aggregation of gold nanoparticles Abstract A simple colorimetric method for the detection of copper ions in water is described. This method is based on the 'click' copper(i)-catalyzed azide-alkyne cycloaddition reaction and its use in promoting the aggregation of azide-tagged gold nanoparticles by a dialkyne cross-linker is described. Nanoparticle cross-linking, evidenced as a colour change, is used for the detection of copper ions. The lowest detected concentration by the naked eye was 1.8 μM, with the response linear with log(concentration) between 1.8-200 μM. The selectivity relative to other potentially interfering ions was evaluated. A simple colorimetric method for the detection of copper ions in water is described. This method is based on the 'click' copper(I)-catalyzed azide-alkyne cycloaddition reaction and its use in promoting the aggregation of azide-tagged gold nanoparticles by a dialkyne cross-linker is described. Nanoparticle cross-linking, evidenced as a colour change, is used for the detection of copper ions. The lowest detected concentration by the naked eye was 1.8 mM, with the response linear with log(concentration) between 1.8-200 mM. The selectivity relative to other potentially interfering ions was evaluated.

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Section: Introductionmentioning

confidence: 99%

A novel route to copper(ii) detection using ‘click’ chemistry-induced aggregation of gold nanoparticles

Hua

Zhang

Almeida

et al. 2012

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“…4 Fisher et al developed an electrode modified with the oligopeptide Gly-Gly-His with an extraordinarily low detection limit in the sub-ppt range (pM) for Cu 2+ ions. 2 Theoretical approaches about metal-oligopeptide structure and metal-ligand coordination geometry have been also performed by molecular dynamics simulations and ab initio calculations. [9][10][11][12][13] Studies have focused on the structural data of metal ion-ligand complexes.…”

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confidence: 99%

“…1,2,6,13 In this study, our attention is focused on the interaction between the oligopeptide of three amino acid residues (GlyGly-His) and metal ion without solvent effect. (The response of the Gly-Gly-His modified electrode to Cu 2+ ion was measured as a current in the solution experiment of Fisher et al.…”

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confidence: 99%

“…10,11 Several groups reported the interactions between the special oligopeptides of three or four amino acid residues and metal ion because those oligopeptides are principally capable of providing the saturated (four electron donor atoms) equatorial binding site. 1,2,6,13 In this study, our attention is focused on the interaction between the oligopeptide of three amino acid residues (GlyGly-His) and metal ion without solvent effect. (The response of the Gly-Gly-His modified electrode to Cu 2+ ion was measured as a current in the solution experiment of Fisher et al.…”

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confidence: 99%

“…Several experimental techniques have been applied to present of specific interactions in metal ion-peptide complexes. [1][2][3][4][5][6][7][8] Conformations of metal ion binding to peptides may have a critical impact on the peptide folding processes and peptide biological functions. Among metal ions, Cu 2+ and Ni 2+ have been widely studied and seem to have most interesting chemistry.…”

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Ab initio Calculations for Exploring Metal Ion-(Gly-Gly-His) Complexes

Kim

2005

Bulletin of the Korean Chemical Society

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The specific interactions in metal ion-peptide systems have been studied in many research groups. It is known that the coordinated metal ions play a significant role in the biological action of peptide. Several experimental techniques have been applied to present of specific interactions in metal ion-peptide complexes. Theoretical approaches about metal-oligopeptide structure and metal-ligand coordination geometry have been also performed by molecular dynamics simulations and ab initio calculations.9-13 Studies have focused on the structural data of metal ion-ligand complexes. Four-coordination geometries were mainly discussed because they are most frequently encountered in the metal-binding sites of metalloproteins. Two-and six-coordination geometries were also considered.10,11 Several groups reported the interactions between the special oligopeptides of three or four amino acid residues and metal ion because those oligopeptides are principally capable of providing the saturated (four electron donor atoms) equatorial binding site. 1,2,6,13 In this study, our attention is focused on the interaction between the oligopeptide of three amino acid residues (GlyGly-His) and metal ion without solvent effect. (The response of the Gly-Gly-His modified electrode to Cu 2+ ion was measured as a current in the solution experiment of Fisher et al..2 ) The interaction between Gly-Gly-His and metal ion is studied by optimized structures and stabilization energies in ab initio calculations. Ab initio calculations are performed with 6-31G(d) and 6-311+G(d,p) basis sets to determine optimized structures and stabilization energies. Density functional theory(DFT) at B3LYP level is carried out using Gaussian98 14 series of program. The optimized structures and the stabilization energies between Gly-Gly-His and metal ions (Ca

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