On the nature of first positive band of molecular nitrogen in LIF of polymer and comparison with Emission spectra in Discharge

By Ranjan Changmai and G. D. Baruah


The present work reports the first positive band system due to molecular nitrogen in the region 5692.9Å -6545.0 Å which is severely quenched where polymer of poly (p-phenylvinylene) is excited with the help of Argon ion laser (5145 ?). We report here similar band system in the region of 5692.9Å -6545.0 Å where a sample of m-nitrobenzaldehyde is excited is uncondensed transformer discharge. A comparison with the spectra is expected to throw sufficient light on the phenomenon of quenching.


Key Words : Quenching, LIF

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