FTIR

We use a time-resolved version of FTIR to investigate the vibrational state distribution of products in chemical reactions and photochemical processes. Time resolved FTIR emission spectroscopy has been used to study the collisional quenching of electronically excited NO. The technique allows us to observe the products formed from a number of pathways from which branching ratios can be calculated. In addition the extent of the vibrational excitation of these products can be quantified, so we can see how much of the available energy is channelled into the vibrational modes of the products. Contour plots of IR emission following pumping of 50mT NO to its A state in the presence of 46mT CO2 and 50T Ar taken at 20 cm-1 resolution. Red represents high intensity and blue represents low intensity. Band assignments are shown.

 

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