Silica microspheres functionalized with porphyrin as a reusable and efficient catalyst for the photooxidation of 1,5-dihydroxynaphthalene in aerated aqueous solution

Photofunctional hybrid silica microspheres covalently functionalized with metalloporphyrins

“…But it can be predicted the main composition and coordination effect of them according to the lanthanide coordination chemistry principle and the functional groups of organic unit. Considering the structure of ligands in this article, we can assume that the nitrogen atom of the thiazole ring and oxygen atom of CQO can coordinate with the lanthanide ions to form a stable six-membered ring structure [31]. These predictions have also been confirmed by infrared spectra.…”

Photochemical Transformations Involving Porphyrins and Phthalocyanines

“…<Scheme 3> 5,10,15,20-Tetrakis(2,6-dichloro-3-chlorosulfophenyl)porphyrin and its Sn and Zn complexes were also successfully used in the photodegradation of 4-chlorophenol and 2,6-dimethylphenol (Monteiro et al 2005). Likewise, silica microspheres functionalized with 5-(4-allyloxy)phenyl-10,15,20-tri(2,6-dichlorophenyl)porphyrin were used to oxidize 1,5-dihydroxynaphthalene under visible light irradiation in aerated aqueous solution (Cai et al 2009). Visible light photocatalysis using SiO 2 immobilized water-soluble and -insoluble tin porphyrins degraded 4-chlorophenol and Acid Orange 7 in water.…”

Homogeneous and Heterogeneous Free-Based Porphyrins Incorporated to Silica Gel as Fluorescent Materials and Visible Light Catalysts Mimic Monooxygenases

“…Very recently a visible light photocatalytical system based on waterinsoluble tin porphyrin Sn(OH) 2 (TPP) immobilized on SiO 2 has been successfully used for the degradation of 4-chlorophenol and acid orange 7 (Kim et al, 2008). Silica microspheres functionalized with 5-(4-allyloxy)phenyl-10,15,20-tri(2,6-dichlorophenyl)porphyrin have been prepared by Huang et al for the photooxidation of 1,5-dihydroxynaphthalene under visible light irradiation in the aerated aqueous solution (Cai et al, 2009). Trytek et al (2009) have presented the results concerning two types of porphyrins (watersoluble and water-insoluble) incorporated into the silica gel which act on the one hand as fluorophores, and on the other hand as efficient catalysts in biomimetic photocatalysis of monoterpene, -pinene, in organic solvent under molecular oxygen.…”