In situ spin trapping of OH radicals photochemically generated by thiophene oligomers incorporated in copper-doped ZSM-5 zeolite in aqueous medium

Autor:	A. Bumbálová, František Šeršeň, G. Čı́k
Rok vydání:	2001
Předmět:	Ion exchange Spin trapping Radical Inorganic chemistry General Chemistry Condensed Matter Physics Photochemistry law.invention chemistry.chemical_compound chemistry Mechanics of Materials law Thiophene Polythiophene General Materials Science Zeolite Electron paramagnetic resonance Visible spectrum
Zdroj:	Microporous and Mesoporous Materials. 46:81-86
ISSN:	1387-1811
DOI:	10.1016/s1387-1811(01)00293-1
Popis:	The formation of reactive oxygen species due to irradiation by visible light of thiophene oligomers incorporated in the pentasile-type Na-ZSM-5 zeolite microstructure has been studied in aqueous medium. The oxidative oligomerization of thiophene was carried out in the zeolite channels after ion exchange of Na + for Cu 2+ . By means of spin trapping, the hydroxyl radicals temporarily produced in situ were detected by EPR spectroscopy in aqueous suspension on the Cu-ZSM-5 sample with polythiophene deposited in the channels of the zeolite microstructure during illumination with visible light.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8ab57a47e8bff87af965c29fa5cdc24b https://doi.org/10.1016/s1387-1811(01)00293-1 Zobrazit plný text záznamu Full Text from ScienceDirect