EXCITED SINGLET AND TRIPLET PRODUCTS GENERATED FROM OXIDATION OF THE ‐CO‐CH‐ CONTAINING MOLECULES

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Abstract
Abstract— In a previous study. we found indirect chemiluminescence from air oxidation of various simple ketones in alkaline aprotic solvents containing 9,10‐diphenylanthracene and 9,10‐dibromoanthracene. By summarizing the experimental results. it was concluded that excited products. mainly in the triplet state. were generated from air oxidation of those simple compounds having a ‐CO‐CH‐group via dioxetane intermediates.Recently. we have succeeded in observing an intense direct chemiluminescence due to the generation of the excited singlet product by the air oxidation of such anthracene derivatives having a ‐CO‐CH‐group as 9,10‐diisobutyrylanthracene and related compounds. The finding lends strong support to the hypothesis that dioxetane or dioxetanone may be the critical intermediate to give fluorescent singlet products.