Most of the research deals with the effect of electronic structural variation upon the efficiency of triplet state carbonyl production from dioxetanes. Other studies involving dioxethanes include the question of preferential n, pi* state (vs pi, pi*) carbonyl formation and attempts to trap the proposed 1,4-dioxybiradical intermediate form thermolysis of dioxetanes. Some amino peroxides were also studied as potential sources of chemilumuniscence (CL). Finally, a detailed kinetic study was made on the thermolysis of a five-membered ring peroxide in order to distinguish between concerted vs stepwise decomposition routes. This study was pertinent to the mechanism of dioxetane (a four-ring peroxide) thermolysis.