  The unidentified infrared emission (UIE) features at 3.3, 6.2, 7.7, 8.6, 11.3
and 12.7 micron are ubiquitously seen in a wide variety of astrophysical
regions and commonly attributed to polycyclic aromatic hydrocarbon (PAH)
molecules. However, the unambiguous identification of any individual, specific
PAH molecules has proven elusive until very recently two isomers of
cyanonapthalene, which consists of two fused benzene rings and substitutes a
nitrile (-CN) group for a hydrogen atom, were discovered in the Taurus
Molecular Cloud based on their rotational transitions at radio frequencies. To
facilitate the James Webb Space Telescope (JWST) to search for cyanonapthalenes
in astrophysical regions, we model the vibrational excitation of
cyanonapthalenes and calculate their infrared emission spectra in a number of
representative astrophysical regions. The model emission spectra and
intensities will allow JWST to quantitatively determine or place an upper limit
on the abundance of cyanonapthalenes.
