Abstract
Rate constants for quenching 253.7 nm fluorescence, and quantum efficiencies for emission of luminescence during mercury-sensitized photolysis have been measured for methanol, ethanol, propanol, isopropanol, n-butanol, isobutanol, sec-butanol, tert-butanol and tert-amyl alcohol. From the variation of luminescent efficiency with the structure of the alcohol it is concluded that the main process competing with luminescence is normally the abstraction of an α-hydrogen by a metastable Hg(3P0) atom formed during quenching of Hg(3P1). For tert-butanol and tert-amyl alcohol the rate constants for reaction with Hg(3P0) are (7.5 ± 2.5)× 10–12 and (2.2 ± 0.8)× 10–11 cm3 molecule–1s–1 respectively; lower limits are given for the rates of reaction of the other alcohols with Hg(3P0).
Published Version
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