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uid 549

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This species has a counterpart in the theoretical library

Transitions

Frequency
[wavenumbers]
Wavelength
[microns]
Integrated cross-section
[km/mol]
3205 3.121 10.1
3121 3.204 17.5
3094 3.233 9.1
3062 3.265 7.7
2861 3.495 45.7
2787 3.588 20.1
2689 3.719 19.3
2665 3.753 8.9
2449 4.083 14.2
2243 4.459 11
1590 6.29 93.1
1558 6.419 116.8
1546 6.47 83.7
1525 6.557 24.6
1456 6.866 188.5
1446 6.914 8.7
1440 6.944 72.9
1394 7.175 35.2
1362 7.341 24.9
1357 7.369 16.4
1346 7.429 241.6
1339 7.47 459.9
1288 7.764 27
1286 7.778 44.8
1257 7.958 36.9
1210 8.264 25.1
1177 8.496 22.9
1113 8.988 20.9
1081 9.247 17.7
1042 9.595 20.9
985.7 10.15 13.4
979.8 10.21 61.2
781 12.8 13.2
774.8 12.91 80.2
750.5 13.32 156.8
745.4 13.42 8.5
725.3 13.79 63.7
610.5 16.38 26.3

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)