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Analytical, Spectral, Thermal and Molecular Modeling Studies of Hg2+-2,3-Butanedionemonoxime Girard's T Hydrazone Complex and Its Application


Affiliations
1 Chemistry Department, Taibah University, Al-Madinah, Saudi Arabia
2 Chemistry Department, Mansoura University, Mansoura, Egypt
 

The coordination behavior of 2,3-butanedionemonoxime Girard's T hydrazone (L1) towards Hg2+ ion has been investigated. The structure of Hg2+ complex, [Hg(L1)Cl]Cl·5H2O, is elucidated using elemental analyses, spectral (IR, UV-visible, 1H-NMR and mass) and TGA measurements. IR spectrum suggests that L1 behaves in a bidentate manner through the azomethine groups. The molecular modeling of L1 and its Hg2+ complex has been investigated. The bond lengths, bond angles, HOMO and LUMO have been calculated. The thermal behavior and kinetic parameters are determined using Coats-Redfern method. The use of L1 for preconcentration and separation via flotation of Hg2+ complex and determination using cold vapor atomic spectrometry (CVAAS) is described. The effects on the percentage of recovered Hg2+ by pH of sample solutions, oleic acid (HOL) concentration, Hg2+ and L1 concentrations are studied in details. The method is applied for the determination of the total Hg2+ (mg·mL−1) in natural water samples.

Keywords

Mercury Complex, 2,3-Butanedionemonoxime Girard’s T Hydrazone, Modeling, Spectral Studies, Separation Using Flotation Method.
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  • Analytical, Spectral, Thermal and Molecular Modeling Studies of Hg2+-2,3-Butanedionemonoxime Girard's T Hydrazone Complex and Its Application

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Authors

Najlaa S. Al-Radadi
Chemistry Department, Taibah University, Al-Madinah, Saudi Arabia
Magda M. Akl
Chemistry Department, Mansoura University, Mansoura, Egypt
Mohamed A. Elbeshlawi
Chemistry Department, Mansoura University, Mansoura, Egypt
Mohsen M. Mostafa
Chemistry Department, Mansoura University, Mansoura, Egypt

Abstract


The coordination behavior of 2,3-butanedionemonoxime Girard's T hydrazone (L1) towards Hg2+ ion has been investigated. The structure of Hg2+ complex, [Hg(L1)Cl]Cl·5H2O, is elucidated using elemental analyses, spectral (IR, UV-visible, 1H-NMR and mass) and TGA measurements. IR spectrum suggests that L1 behaves in a bidentate manner through the azomethine groups. The molecular modeling of L1 and its Hg2+ complex has been investigated. The bond lengths, bond angles, HOMO and LUMO have been calculated. The thermal behavior and kinetic parameters are determined using Coats-Redfern method. The use of L1 for preconcentration and separation via flotation of Hg2+ complex and determination using cold vapor atomic spectrometry (CVAAS) is described. The effects on the percentage of recovered Hg2+ by pH of sample solutions, oleic acid (HOL) concentration, Hg2+ and L1 concentrations are studied in details. The method is applied for the determination of the total Hg2+ (mg·mL−1) in natural water samples.

Keywords


Mercury Complex, 2,3-Butanedionemonoxime Girard’s T Hydrazone, Modeling, Spectral Studies, Separation Using Flotation Method.