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uid 387

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This species has a counterpart in the theoretical library

Transitions

Frequency
[wavenumbers]
Wavelength
[microns]
Integrated cross-section
[km/mol]
3066 3.262 84.28
1940 5.154 2.047
1925 5.194 4.094
1905 5.25 2.047
1800 5.556 4.094
1679 5.956 2.047
1616 6.186 4.094
1493 6.699 2.047
1480 6.758 2.047
1462 6.841 32.51
1456 6.866 21.67
1444 6.924 13.24
1429 6.997 16.25
1231 8.126 2.047
1217 8.217 2.047
1184 8.443 3.07
1159 8.628 2.047
1137 8.793 7.224
1106 9.039 2.047
1037 9.646 2.047
1034 9.674 1.023
1020 9.809 2.047
936.3 10.68 2.047
827.9 12.08 10.23
776.7 12.87 102.3
762.9 13.11 1.023
744.5 13.43 25.28
672 14.88 1.023
619.3 16.15 13.24
561.1 17.82 2.047

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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75 species present in version 2.00 of the experimental database (Nov 13, 2013)