Spectroscopic, Electrochemical, Magnetic and Structural Characterization of an Hexamethylenetetramine Co(II) Porphyrin Complex - Application in the Catalytic Degradation of Vat Yellow 1 Dye - INSTITUT DES SCIENCES CHIMIQUES DE RENNES Accéder directement au contenu
Article Dans Une Revue Journal of Molecular Structure Année : 2021

Spectroscopic, Electrochemical, Magnetic and Structural Characterization of an Hexamethylenetetramine Co(II) Porphyrin Complex - Application in the Catalytic Degradation of Vat Yellow 1 Dye

Résumé

In this study, a new cobaltous-(hexamethylenetetramine) [meso-tetra(para-methoxyphenyl)porphyrin complex with the formula [CoII(TMPP)(HMTA)] (I) was synthesized. The molecular structure was confirmed in solution by 1H NMR spectroscopy and mass spectrometry methods, and the single crystal X-ray diffraction structure of (I) was determined at both room temperature and low temperature. This species was further characterized by infrared, UV-visible and fluorescence spectroscopies, magnetic susceptibility measurements and cyclic voltammetry. The chemical reactivity behavior was also assessed theoretically through Density Functional Theory (DFT) approach. Magnetic investigation indicates that the Co(II)-HMTA porphyrin (I) species at low temperature is a cobaltous low-spin (S~=~1/2) species while at high temperature complex (I) exhibits a spin-crossover low-spin (S~=~1/2) ↔ high-spin (S~=~3/2). The adsorption kinetic of the ``vat yellow 1 dye'' was carried out in aqueous solution at pH~=~6. The experimental results are better fitted using the pseudo second order model. Furthermore, complex (I) was tested as catalyst in the degradation of the vat yellow 1 dye using an aqueous H2O2 solution and by photodegradation under solar light.

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Chimie
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Dates et versions

hal-03133035 , version 1 (26-11-2021)

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Soumaya Nasri, Melek Hajji, Mouhieddinne Guergueb, Selma Dhifaoui, Valerie Marvaud, et al.. Spectroscopic, Electrochemical, Magnetic and Structural Characterization of an Hexamethylenetetramine Co(II) Porphyrin Complex - Application in the Catalytic Degradation of Vat Yellow 1 Dye. Journal of Molecular Structure, 2021, 1231, pp.129676. ⟨10.1016/j.molstruc.2020.129676⟩. ⟨hal-03133035⟩
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