کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
27612 | 44032 | 2013 | 6 صفحه PDF | دانلود رایگان |
• Tetra(4-carboxypenyl)porphyrin adsorbed on SiO2 with visible light generate singlet oxygen.
• The absence of the EPR DMPO-O2− signal evidenced that superoxide anion was not present.
• Anthraquinone and oxanthrone produced by the decomposition of the endoperoxide intermediary were identified as the only oxidation products of anthracene.
The production of singlet oxygen with tetra(4-carboxyphenyl)porphyrin adsorbed on SiO2 irradiated with visible light (λ > 500 nm) was evidenced by EPR spectra of TEMPO formed by oxidation of 2,2,6,6-tetramethyl-4-piperidone(TEMP) with 1O2. The formation of singlet oxygen was also evidenced by the formation of anthraquinone and oxanthrone as oxidation products of anthracene with 1O2. The absence of the EPR DMPO-O2− signal evidenced that superoxide anion was not present. No other oxygen radicals were detected. TCPP and TCPP/SiO2 were characterized with UV–vis, UV–vis diffuse reflectance and FT-IR spectroscopy.
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 259, 1 May 2013, Pages 47–52