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uid 280

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This species has a counterpart in the theoretical library

Transitions

Frequency
[wavenumbers]
Wavelength
[microns]
Integrated cross-section
[km/mol]
3064 3.264 120.4
1945 5.142 5.478
1918 5.214 3.913
1903 5.255 0.7826
1835 5.45 1.565
1808 5.53 3.13
1769 5.654 0.7826
1762 5.675 0.7826
1749 5.719 1.565
1679 5.956 4.696
1624 6.159 0.7826
1616 6.19 0.7826
1608 6.22 0.7826
1552 6.443 1.565
1505 6.646 13.85
1478 6.766 3.913
1459 6.854 3.913
1433 6.979 1.565
1411 7.085 1.565
1359 7.358 2.348
1341 7.458 2.348
1326 7.539 1.565
1300 7.695 10.23
1276 7.835 6.02
1240 8.063 5.478
1223 8.177 2.348
1217 8.218 0.7826
1174 8.519 2.348
1155 8.655 2.348
1142 8.757 0.7826
1134 8.821 1.565
1040 9.613 3.913
1010 9.898 2.348
985.8 10.14 1.565
951.7 10.51 3.913
943.9 10.59 1.565
908.4 11.01 0.2348
876 11.42 52.37
804.9 12.42 21.67
782.5 12.78 5.478
758.5 13.18 1.565
747 13.39 78.26
737.4 13.56 3.13
685.3 14.59 4.696
650 15.38 3.913
621 16.1 2.348
576.4 17.35 5.478
565.2 17.69 2.348
539 18.55 5.478
508.5 19.67 2.348
467.8 21.38 10.84

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)