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uid 538

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This species has a counterpart in the theoretical library

Transitions

Frequency
[wavenumbers]
Wavelength
[microns]
Integrated cross-section
[km/mol]
3120 3.205 15.92
3087 3.24 36.34
3063 3.265 5.78
3052 3.277 7.712
3023 3.308 6.996
1951 5.126 3.367
1928 5.185 1.659
1926 5.193 1.546
1916 5.219 1.558
1906 5.246 0.8849
1882 5.313 1.77
1855 5.39 2.486
1833 5.454 0.8148
1804 5.542 1.344
1799 5.558 0.7424
1781 5.615 2.464
1737 5.758 1.845
1723 5.803 0.5834
1694 5.902 5.672
1618 6.179 1.528
1601 6.245 13.67
1592 6.283 5.855
1573 6.356 4.19
1557 6.423 0.8892
1543 6.48 6.388
1488 6.719 6.272
1484 6.739 1.103
1462 6.839 4.554
1449 6.901 7.689
1441 6.939 51.9
1423 7.029 2.634
1412 7.085 0.5376
1403 7.126 6.21
1394 7.175 20.19
1385 7.219 2.618
1376 7.265 0.8036
1348 7.421 1.786
1338 7.476 1.631
1265 7.908 10.19
1255 7.967 0.5428
1250 7.999 0.7546
1233 8.113 0.6881
1201 8.327 5.722
1185 8.438 0.5022
1169 8.556 2.713
1136 8.799 2.317
1118 8.944 1.625
1097 9.116 2.833
1053 9.493 8.14
1038 9.631 1.201
1012 9.883 0.8869
994.6 10.05 0.9398
818.5 12.22 0.9357
803.5 12.45 5.528
794.7 12.58 0.6802
751.6 13.3 178.9
618.5 16.17 14.52
578.1 17.3 2.088
509.5 19.63 2.1
473.5 21.12 5.798

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 3.00 of the experimental database (Apr 16, 2020)