Supported photosensitizers for the visible light activation of phenols towards oxygen

E. Pepe , O. Abbas , C. Rébufa , Maryse Simon (1) , Sylvie Lacombe-Lhoste (1) , M. Julliard

1 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux

To circumvent the drawbacks of the homogeneous photosensitization, a series of photosensitizing molecules, mainly porphyrins and phthalocyanines, were supported on aminopropyl silica and/or exchange resins. Their grafting ratios were evaluated and their efficiencies were assayed on the ability to photo-oxidize phenol under 900 W/m2 visible light. A comparison was done by determining the time necessary to obtain 50% consumption of the substrate. Under these conditions, the meso tetra(4-sulfonatophenyl)porphine displayed the best photocatalytic effect.

Mots clés: Bleaching; diffuse reflectance spectroscopy; drug structure; Gas chromatography; High performance liquid chromatography; light; Oxygen; Phenol photo-oxidation; photochemistry; Photooxidation; Photosensitization; Phthalocyanines; Porphyrins; silicon dioxide; Supported Photosensitizers; ultraviolet spectrophotometry

Domaines: Chimie; Matériaux; Chimie organique

E. Pepe, O. Abbas, C. Rébufa, Maryse Simon, Sylvie Lacombe-Lhoste, et al.. Supported photosensitizers for the visible light activation of phenols towards oxygen. Journal of Photochemistry and Photobiology A: Chemistry, 2005, 170 (2), pp.143-149. ⟨10.1016/j.jphotochem.2004.06.019⟩. ⟨hal-01582230⟩