Solid-State Characterization of Acetylpyridine Copper Complexes for the Activation of H₂O₂ in Advanced Oxidation Processes

Resumen

Abstract This work describes the synthesis of 4-(4-AcPy) and 3-acetylpyridine (3-AcPy) copper soluble complexes for the activation of hydrogen peroxide and the concomitant generation of reactive oxygen species (ROS). Given the paramagnetic effects of copper ions in the Nuclear Magnetic Resonance (NMR) lines, we aimed at demonstrating that the combination of high-resolution 2D solid-state NMR experiments, Electron Paramagnetic Resonance (EPR), single-crystal X-ray crystallography and Density Functional Theory (DFT) calculations allows a detailed study of the chemical structure of the ligands and the surrounding metal ions. The copper complexes synthesized with CuCl 2 were useful for the activation of H 2 O 2 during which the only ROS was the hydroxyl one, as demonstrated by EPR experiments. A removal of methyl orange (MO) azo-dye higher than 85 % was achieved in 200 minutes, combining 1.7 mM of copper complexes with 60 mM of H 2 O 2 and 40 μM of MO.

Jonás J. Pérez Bravo

Posdoct-CONICET

He participado en el desarrollo de biomateriales aplicados a la agroindustria, compósitos nanoestructurados para fotodegradación y/o adsorción de contaminantes.

Juan Manuel Lázaro Martínez

Investigador

Dedicado a la síntesis y caracterización de nanocompuestos a base de polímeros naturales para el desarrollo de materiales inteligentes funcionales