Observation of the A1A" state of isocyanogen.


The A1A" state of isocyanogen, CNCN, is observed using photofragment fluorescence excitation spectroscopy in a room temperature cell and in a molecular beam. The spectra are highly congested, but progressions that correspond to the Franck-Condon active C-N-C bending vibration in the excited state are evident. Linewidth measurements indicate that the excited state lifetime is <10 ps. These measurements are consistent with previous ab initio calculations, which predicted a bent excited state with a short lifetime due to predissociation. Although we do not believe that we have observed the origin band of the electronic transition, we place an upper limit of 42,523 cm(-1) on the energy of the excited state zero point level.

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@article{Lynch2007ObservationOT, title={Observation of the A1A" state of isocyanogen.}, author={William B. Lynch and Hans A. Bechtel and Adam H Steeves and John J Curley and Robert W Field}, journal={The Journal of chemical physics}, year={2007}, volume={126 24}, pages={244307} }