Photocatalyzed reaction of indole in an aqueous suspension of titanium dioxide

摘要

The photocatalyzed oxidation of indole (1) in an aqueous suspension oftitanium dioxide has been investigated and an attempt has been made to identify the　products formed during the photooxidation process by gas chromatographic–mass　spectrometric (GC–MS) analysis. Photolysis of an aqueous solution of indole (1) in　the presence of titanium dioxide and oxygen led to the formation of 2,3-dihydroindole- 2-one (6) and 1H-indole-2,3-dione (7). A probable pathway for the formation　of these products has been proposed.