Synthesis and structural characterization of new 2-bromo-1,3-bis(triazol-1-ylmethyl)benzene ligands. Study of their behavior as complexing agents for determination of nickel(II) by adsorptive stripping voltammetry

doi:10.1080/00958972.2013.764997

Paper

Synthesis and structural characterization of new 2-bromo-1,3-bis(triazol-1-ylmethyl)benzene ligands. Study of their behavior as complexing agents for determination of nickel(II) by adsorptive stripping voltammetry

Published Jan 16, 2013 · J. Hurtado, Edgar Nagles, V. Arancibia

Journal of Coordination Chemistry

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Abstract

Reaction of 2-bromo-1,3-bis(bromomethyl)benzene (1) with 1,2,3-triazole and benzotriazole yields 2-bromo-1,3-bis(triazol-1-ylmethyl)benzene (2) and 2-bromo-1,3-bis(benzotriazol-1-ylmethyl)benzene (3), isolated as white solids, air stable at room temperature, and characterized by elemental analysis, mass spectra, IR, and NMR (1H, 13C) spectroscopy. The molecular structure of 3 was determined by single-crystal X-ray diffraction. These ligands were evaluated for determination of ultra-trace concentrations of nickel by adsorptive stripping voltammetry. The method is based on adsorptive accumulation of the Ni(II)-L complex onto a hanging mercury drop electrode, followed by reduction of the adsorbed species by voltammetric scan using square wave modulation. However, only with 2 was a signal observed at −0.81 V. Under the best experimental conditions (pH 5.5; ligand concentration 0.30 μmol L−1; adsorptive potential (E ads) −0.70 V and adsorptive time (t ads) 80 s), the peak current is proportional to the Ni(II) concentration to 15.0 μg L−1, with a 3 detection limit of 0.2 μg L−1. The proposed method was validated by determining Ni(II) in certified reference waste water (SPS–WW1) with satisfactory results.

Study Snapshot

New 2-bromo-1,3-bis(triazol-1-ylmethyl)benzene ligands effectively determine ultra-trace nickel concentrations by adsorptive stripping voltammetry, with a detection limit of 0.2 g L1.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Paper

Synthesis and structural characterization of new 2-bromo-1,3-bis(triazol-1-ylmethyl)benzene ligands. Study of their behavior as complexing agents for determination of nickel(II) by adsorptive stripping voltammetry

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References

Adsorptive stripping voltammetry of nickel with 1-nitroso-2-napthol using a bismuth film electrode.

The proposed voltammetric method effectively determines nickel in aqueous solutions, with a detection limit of 0.1 g L-1, and has been validated in reference waste water and trace element samples.

An efficient approach to designing and optimizing the analysis of Ni(II) by AdCSV in seawater.

The developed voltammetric method effectively determines nickel in seawater at nanomolar concentrations, with a detection limit of 0.04 10 9 M and high precision.

Chiral Nickel(II) and Palladium(II) NCN-Pincer Complexes Based on Substituted Benzene: Synthesis, Structure, and Lewis Acidity

Chiral nickel(II) and palladium(II) NCN-pincer complexes with varying Lewis acidity can be synthesized, with structures showing square-planar geometries and varying relative acidity depending on the substituents on the benzene core.

Oxime-substituted NCN-pincer palladium and platinum halide polymers through non-covalent hydrogen bonding (NCN = [C6H2(CH2NMe2)2-2,6]−)

Oxime-substituted NCN-pincer polymers with helically arranged building blocks can form linear hydrogen-bridged polymers with metal-bonded bromide contacts.

Applicability of a liquid membrane in enrichment and determination of nickel traces from natural waters

The liquid membrane method effectively enriches and separates nickel traces from natural waters, with high transport efficiencies and high precision, even in saline samples.

Citations

Determination of Trace Nickel in Water Samples by Graphite Furnace Atomic Absorption Spectrometry after Mixed Micelle-Mediated Cloud Point Extraction

The proposed cloud point extraction method effectively preconcentrates ultra-trace nickel in water samples, enabling accurate determination by graphite furnace atomic absorption spectrometry.

Study on Molecularly Imprinted Sensor Based on Photocurrent Response for Ni-complex

The novel molecularly imprinted sensor based on photocurrent response effectively detects Ni 2+ in real water samples, with a detection limit of 8.31 10 12 M.

Determination of Ni(II) in Alloy by Spectrophotometric Method with a new Chromogenic Reagent (IDPBS)

The new chromogenic reagent (IDPBS) provides a sensitive, accurate, and rapid method for determining nickel (II) in alloys, comparable to flame atomic absorption spectrometry.