Fluorescence of monochlorobenzene in the vapor phase

Abstract
The vapor phase fluorescence of monochlorobenzene has been measured in the presence of ethane, propane, or n‐butane. The excitation wavelength effect on the fluorescence quantum yield indicates that there should be a fast nonradiative decay channel, an intermediate isomer, at around 240 nm. Pressure effect of a foreign gas on the fluorescence quantum yield is also studied and the nonradiative relaxation processes are discussed.

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