A new cobalt(ii) meso-porphyrin: synthesis, characterization, electric properties and application in the catalytic degradation of dyes

Nesrine Amiri; Mouhieddinne Guergueb; Maged S Al-Fakeh; Marwa Bourguiba; Habib Nasri

doi:10.1039/d0ra08786f

A new cobalt(ii) meso-porphyrin: synthesis, characterization, electric properties and application in the catalytic degradation of dyes

RSC Adv. 2020 Dec 18;10(73):44920-44932. doi: 10.1039/d0ra08786f. eCollection 2020 Dec 17.

Authors

Nesrine Amiri¹, Mouhieddinne Guergueb¹, Maged S Al-Fakeh², Marwa Bourguiba^{3

4}, Habib Nasri¹

Affiliations

¹ Laboratory of Physico-Chemistry of Materials, University of Monastir Avenue of the Environment 5019 Monastir Tunisia nesamiri@gmail.com +216 28256432.
² Department of Chemistry, Faculty of Science, Qassim University Saudi Arabia.
³ Applied Mechanics and Systems Research Laboratory (LASMAP-EPT), Polytechnic School, University of Carthage La Marsa Tunisia.
⁴ Faculty of Science of Tunis, University of Tunis El Manar Tunisia.

Abstract

In this work, a new porphyrin, 5,10,15,20-tetrakis{4-[((4-methoxyphenyl)acetyl)oxy]phenyl}porphyrin (H₂TMAPP) (1), and its cobalt complex [Co^II(TMAPP)] (2) were synthesized in good and quantitative yields, respectively. The chemical structures of these synthesized compounds were confirmed by FT-IR, ¹H NMR, MS, UV-visible, and fluorescence spectroscopy. Their photophysical properties, namely their molar extinction coefficients (∑), fluorescence quantum yields (Φ _f) and lifetimes (τ _f), were determined and compared with those of meso-tetraphenylporphyrin. Furthermore, their electrochemical behaviours were examined using cyclic voltammetry (CV). Dielectric properties such as the conductivity (σ) and the real (M') and imaginary (M'') parts of the dielectric modulus were investigated as a function of temperature and frequency. The impedance analysis was carried out using Cole-Cole plots to elucidate the electrical conduction mechanism. The catalytic power and the adsorption properties of the prepared compounds were studied for methylene blue (MB) and crystal violet (CV) degradation. The results reveal that the studied compound [Co^II(TMAPP)] can be used as a catalyst for the decolourisation of dyes in the presence of H₂O₂.