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uid 334

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This species has a counterpart in the theoretical library

Transitions

Frequency
[wavenumbers]
Wavelength
[microns]
Integrated cross-section
[km/mol]
3050 3.278 102.3
1931 5.18 5.418
1918 5.214 2.167
1912 5.231 1.084
1793 5.578 7.826
1604 6.234 8.428
1581 6.324 0.5418
1471 6.798 2.167
1435 6.97 13.24
1312 7.621 3.251
1243 8.045 4.334
1184 8.447 20.47
1164 8.587 1.084
1097 9.113 4.334
964.1 10.37 1.084
842.8 11.87 108.4
821.5 12.17 5.418
743.9 13.44 18.66
711.8 14.05 46.35
542.6 18.43 2.167
499.2 20.03 1.084
487.6 20.51 1.084

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)