Abstract

The two-laser "pump-probe" photolytic fragmentation fluorescence spectrometry of three octenes and two nonenes is described. Probe-laser-induced C₂ fluorescence (Deslandres-d'Azambuja system, <i>C</i>¹II_<i>g</i>, → <i>A</i>¹II_<i>H</i>) is detected. The relative C₂ fluorescence intensity and spectral patterns exhibited by each alkene are strongly dependent on the probe-laser wavelength. The dependence of the fragment fluorescence intensity on the probe-laser fluence implies that the "probe" laser induces photofragmentation of intermediate species produced by the "photolysis" laser.

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