INFRARED SPECTROSCOPY AND PHOTOCHEMISTRY OF NCCN$^+$ AND CNCN$^+$ TRAPPED IN SOLID NEON
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Publisher:Ohio State University
When a very dilute mixture of NCCN in neon is codeposited at 4.3 K with a beam of neon atoms that have been excited in a microwave discharge, prominent infrared absorptions of the uncharged isomers CNCN and CNNC appear in the resulting solid. The $\nu_3$ absorption of NCCN$^+$ is also very prominent, and the ground-state $\nu_1$ + $\nu_3$ absorption of that product is observed for the first time. Photoisomerization to CNCN$^+$, for which the two CN-stretching fundamentals are identified, occurs in the red spectral region, and photodestruction of both NCCN$^+$ and CNCN$^+$ occurs in the near ultraviolet. The photochemistry of these two cations is correlated with recently published results of experimental and quantum chemical studies of their electronic energy levels.
Author Institution: Optical Technology Division, National Institute of Standards and Technology, Gaithersburg, MD 20899-8441