The present work reports the first positive band system due to molecular nitrogen in the region 5692.9Š-6545.0 Šwhich is severely quenched where polymer of poly (p-phenylvinylene) is excited with the help of Argon ion laser (5145 Ǻ). We report here similar band system in the region of 5692.9Š-6545.0 Šwhere 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.
