Spectroscopic, Electrochemical, Magnetic and Structural Characterization of an Hexamethylenetetramine Co(II) Porphyrin Complex – Application in the Catalytic Degradation of Vat Yellow 1 dye - Université de Rennes
Article Dans Une Revue Journal of Molecular Structure Année : 2020

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 [Co$^{II}$(TMPP)(HMTA)] ( I ) was synthesized. The molecular structure was con- firmed in solution by 1 H 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 temper- ature 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 H$_2$O$_2$ solution and by photodegradation under solar light.
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Dates et versions

hal-04692668 , version 1 (26-11-2021)
hal-04692668 , version 2 (10-09-2024)

Identifiants

Citer

Soumaya Nasri, Melek Hajji, Mouhieddinne Guergueb, Selma Dhifaoui, Valérie 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, 2020, 1231, pp.129676. ⟨10.1016/j.molstruc.2020.129676⟩. ⟨hal-04692668v2⟩
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