The vinyl benzaldehyde introduced into the quinoxaline derivatives in the conjugation unit showed strong bluish green emission at 484nm in the photoluminescene spectra. Wavelength values on the x axis are generally measured in nanometers nm rather than in cm 1 as is the convention in ir spectroscopy. If there is a very strong peak between 1640 and 1850 cm 1 there is most likely a carbonyl function in the molecule.
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