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uid 391

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This species has a counterpart in the theoretical library

Transitions

Frequency
[wavenumbers]
Wavelength
[microns]
Integrated cross-section
[km/mol]
3074 3.254 132.4
1943 5.146 5.9
1922 5.203 4.214
1909 5.237 1.686
1892 5.286 0.8428
1839 5.438 0.8428
1831 5.461 0.8428
1802 5.55 1.686
1791 5.583 0.8428
1783 5.609 0.8428
1768 5.656 0.8428
1748 5.72 0.8428
1722 5.809 4.214
1689 5.919 0.8428
1612 6.204 0.8428
1605 6.23 1.686
1600 6.252 3.371
1535 6.514 15.05
1490 6.71 3.371
1473 6.789 2.528
1465 6.828 9.03
1456 6.867 16.86
1448 6.905 0.8428
1443 6.932 25.89
1431 6.99 0.8428
1425 7.016 7.826
1389 7.199 0.8428
1378 7.26 17.46
1362 7.345 3.371
1336 7.483 0.8428
1314 7.609 0.8428
1275 7.841 0.8428
1242 8.053 1.686
1234 8.101 4.214
1216 8.221 5.057
1176 8.507 0.8428
1159 8.629 3.371
1151 8.689 6.622
1139 8.78 2.528
1105 9.046 2.528
1037 9.641 6.622
1014 9.857 2.528
1004 9.962 2.528
962.5 10.39 0.8428
946.8 10.56 2.528
935.8 10.69 1.686
892.5 11.2 13.24
857.8 11.66 2.528
803.5 12.45 0.8428
777.4 12.86 57.19
762.6 13.11 3.371
753.1 13.28 5.057
744.1 13.44 84.28
735.7 13.59 27.09
688.6 14.52 0.8428
627.4 15.94 1.686
617.9 16.18 9.03
591.9 16.89 1.686
563.4 17.75 1.686
543.6 18.4 4.214
503.3 19.87 10.23

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 3.00 of the experimental database (Apr 16, 2020)