The Mechanism of Acetone Vapor Fluorescence

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Abstract
The decay rates for the fluorescence of acetone vapor have been determined at several temperatures and pressures, and in the presence and absence of foreign gases, particularly oxygen. The quenching of the fluorescence has also been studied over a similar range of conditions. Since both the presence of oxygen and an increase in temperature tend to eliminate the fluorescence from one of the upper states, it has proved possible to obtain rate constants for the state not so eliminated. Approximate constants for the other state may be obtained by use of the data on total fluorescence in conjunction with data on the temperature and oxygen insensitive state. The data indicate that these two states are formed by independent or nearly independent paths so that molecules in one state are not transformed into molecules in the other under the conditions of these experiments. A consideration of this and previous work permits a further elucidation of the fluorescence phenomena.

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