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PRIMARY INTERMEDIATE IDENTIFIED DURING HETEROGENEOUS PHOTOLYSIS OF ACID ORANGE 7
Year: 2025
Type of publication: článek v odborném periodiku
Name of source: Journal of Photochemistry and Photobiology A-Chemistry
Page from-to: 1-10
Titles:
Language Name Abstract Keywords
cze PRIMÁRNÍ MEZIPRODUKT IDENTIFIKOVANÝ BĚHEM HETEROGENNÍ FOTOLÝZY ACID ORANGE 7 Acid Orange 7 byla fotokatalyticky degradována v suspenzi oxidu titaničitého pomocí probublávání kyslíku a polychromatického záření z vysokotlaké Hg lampy v trubkovém fotoreaktoru se zpětným tokem. Barvivo bylo rozpuštěno v pufrech na bázi vodného uhličitanu sodného (pH 10), hydroxidu sodného (pH 10) nebo kyseliny chlorovodíkové (pH 4). Reakční produkty byly analyzovány pomocí NMR a MS spektroskopie a také HPLC. Z fotoreaktoru byl detekován a preparativně izolován dosud nepopsaný primární meziprodukt, kyselina 3-hydroxy-4-[(2-hydroxy-1-naftyl)diazenyl]benzensulfonová. Identita produktu fotolýzy byla potvrzena porovnáním s chemicky syntetizovaným standardem. Byla také zkoumána kinetika heterogenní fotolýzy Acid Orange 7. Heterogenní fotolýza, Acid Orange 7, Fotoprodukty, 3-hydroxy-4-[(2-hydroxy-1-naftyl)diazen-1-yl]benzensulfonová kyselina, Kinetika, Oxid titaničitý
eng PRIMARY INTERMEDIATE IDENTIFIED DURING HETEROGENEOUS PHOTOLYSIS OF ACID ORANGE 7 Acid Orange 7 was photocatalytically degraded in a titanium dioxide slurry using oxygen bubbling and polychromatic radiation from a high-pressure Hg lamp in a back-flow tubular photoreactor. The dye was dissolved in buffers based on aqueous sodium carbonate (pH 10), sodium hydroxide (pH 10), or hydrochloric acid (pH 4). Reaction products were analyzed by NMR and MS spectroscopy as well as HPLC. A previously undescribed primary intermediate, 3-hydroxy-4-[(2-hydroxy-1-naphthyl)diazenyl]benzenesulfonic acid, was detected and isolated on a preparative scale from the photoreactor. The identity of the photolysis product was confirmed by comparison with a chemically synthesized standard. The kinetics of the heterogeneous photolysis of Acid Orange 7 was also investigated. Heterogeneous photolysis, Acid Orange 7, Photoproducts, 3-hydroxy-4-[(2-hydroxy-1-naphthyl)diazene-1-yl]benzenesulfonic acid, Kinetics, Titanium Dioxide

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