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uid 389

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This species has a counterpart in the theoretical library

Transitions

Frequency
[wavenumbers]
Wavelength
[microns]
Integrated cross-section
[km/mol]
3059 3.269 150.5
1937 5.162 5.418
1921 5.205 3.612
1897 5.271 1.806
1864 5.366 2.709
1828 5.47 1.806
1806 5.537 4.515
1788 5.592 1.806
1779 5.621 0.903
1752 5.708 1.806
1752 5.708 1.806
1715 5.831 0.903
1689 5.922 1.806
1677 5.963 1.806
1632 6.127 2.709
1592 6.281 3.612
1582 6.321 5.418
1532 6.53 7.224
1482 6.748 1.806
1463 6.834 24.68
1452 6.887 2.709
1444 6.925 38.53
1439 6.95 9.03
1419 7.048 1.806
1412 7.08 1.806
1394 7.174 4.515
1359 7.358 1.806
1304 7.668 2.709
1216 8.221 4.515
1185 8.437 10.84
1166 8.577 5.418
1158 8.637 2.709
1148 8.709 2.709
1126 8.879 0.903
1114 8.979 1.806
1080 9.259 1.806
1026 9.745 2.709
1013 9.871 7.224
954.7 10.47 0.903
949.4 10.53 1.806
935.8 10.69 1.806
932.9 10.72 0.903
900.9 11.1 1.806
876.7 11.41 27.69
861.7 11.6 1.806
839 11.92 12.64
811.7 12.32 4.515
783 12.77 14.45
748.7 13.36 25.28
739 13.53 90.3
728.1 13.73 3.612
684.3 14.61 3.612
620.9 16.11 31.3
607.2 16.47 4.515
575.7 17.37 1.806
551.7 18.13 1.806
481.5 20.77 9.03

Laboratory Spectrum

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This spectrum was measured using the matrix isolation technique. Samples are prepared by co-deposition of the PAH in the gaseous state with an overabundance of argon onto a cold CsI window suspended in a high vacuum chamber (p ~ 10-8 mtorr). The CsI window temperature is held between 10 and 15 K for the duration of the experiment. The infrared spectrum of the cold CsI window is recorded prior to (I0) and immediately after sample deposition (In). The absorbance spectrum for a neutral, matrix isolated PAH is log(In/I0).

By irradiating this matrix with ultraviolet radiation from a microwave powered hydrogen discharge lamp produces ionized PAHs. The infrared spectrum is again measured (Ii), now having absorption bands due to both the neutral and ionized PAH. This absorbance spectrum (log (I/Ii)) is compared with that of the neutral PAH. Most of the new bands produced by ultraviolet irradiation are due to the ionized form of the PAH. See the provided reference for the specific details regarding the data presented here. In some cases a few bands near 1600 cm-1 may be due to H2O.

Note(s):


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84 species present in version 3.10 of the experimental database (Apr 13, 2023)