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uid 536

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This species has a counterpart in the theoretical library

Transitions

Frequency
[wavenumbers]
Wavelength
[microns]
Integrated cross-section
[km/mol]
3091 3.235 42.76
3066 3.262 86.1
3026 3.305 17.5
1942 5.149 7.688
1926 5.191 14.21
1900 5.263 3.048
1854 5.393 4.304
1835 5.449 1.028
1828 5.472 0.529
1818 5.5 1.073
1808 5.53 2.181
1798 5.561 1.773
1788 5.593 1.108
1783 5.609 1.828
1758 5.688 1.385
1692 5.909 1.909
1687 5.927 0.7678
1609 6.215 14.77
1597 6.262 2.352
1593 6.279 0.9653
1580 6.331 5.226
1575 6.35 7.186
1562 6.401 14.79
1543 6.482 0.8212
1497 6.678 9.729
1493 6.698 13.1
1477 6.77 22.11
1462 6.839 3.647
1442 6.932 22.72
1439 6.95 61.4
1439 6.95 38.87
1424 7.022 4.164
1411 7.088 5.425
1398 7.156 3.884
1355 7.381 8.475
1341 7.455 12.27
1315 7.607 0.9181
1306 7.657 3.896
1294 7.725 1.563
1266 7.898 4.547
1256 7.962 1.108
1227 8.15 3.475
1212 8.253 12.71
1180 8.472 4.56
1150 8.698 6.131
1139 8.781 3.185
1119 8.935 9.637
1012 9.884 6.488
1004 9.955 1.463
964.4 10.37 0.615
951.3 10.51 3.501
876.7 11.41 55.01
847.6 11.8 3.061
808.3 12.37 0.9606
796.2 12.56 49.29
742.1 13.48 25.29
706.4 14.16 38
627.4 15.94 1.639
570.3 17.53 39.45
463.9 21.56 10.97

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)