Spectral and photochemical properties of tetraphenylporphyrin tetrasulfonate supported on modified montmorillonite nanoparticles

Autor:	E. Yu. Khavina, V. B. Ivanov, Peter P. Levin
Rok vydání:	2014
Předmět:	chemistry.chemical_compound Aqueous solution Reaction rate constant Quenching (fluorescence) chemistry Singlet oxygen Inorganic chemistry Tetraphenylporphyrin Photocatalysis Physical and Theoretical Chemistry Triplet state Photochemistry Porphyrin
Zdroj:	High Energy Chemistry. 48:321-324
ISSN:	1608-3148 0018-1439
DOI:	10.1134/s0018143914050087
Popis:	A photocatalyst that effectively sensitizes the oxidation of 9,10-diphenylanthracene in toluene under irradiation with visible light has been prepared by the treatment of cationic surfactant-modified montmorillonite nanoparticles with a solution of meso-tetrakis(4-sulfonatophenyl)porphyrin. Reaction quantum yields and singlet oxygen generation probability have been determined. The shifts and intensity changes observed for the absorption bands of meso-tetrakis(4-sulfonatophenyl)porphyrin in the catalyst as compared with aqueous solutions are associated with solvation effects. The meso-tetrakis(4-sulfonatophenyl)porphyrin triplet state has been detected using the laser photolysis technique, and the rate constant of its quenching by oxygen on the surface of nanoparticles has been measured.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0d4c0a9af5e0f7e767df0b18f1ac7ed2 https://doi.org/10.1134/s0018143914050087 Zobrazit plný text záznamu Plný text ve formátu PDF