An older version of the experimental database is currently selected, click here to switch to the latest
You need a browser with JavaScript support in order to view the molecule in 3D
uid 393

TransitionsLeft-clk & drag: Zoom; Right-clk: reset

This species has a counterpart in the theoretical library

Transitions

Frequency
[wavenumbers]
Wavelength
[microns]
Integrated cross-section
[km/mol]
3069 3.258 150.5
1942 5.15 2.408
1925 5.195 1.204
1920 5.208 1.204
1800 5.557 0.602
1792 5.582 1.204
1784 5.605 0.602
1779 5.621 0.602
1770 5.65 0.602
1756 5.694 10.23
1692 5.91 0.602
1615 6.193 7.826
1586 6.305 0.602
1506 6.641 7.826
1490 6.713 15.05
1476 6.777 1.204
1465 6.827 0.602
1451 6.89 50.57
1440 6.946 1.204
1430 6.993 13.24
1408 7.1 4.816
1374 7.275 2.408
1336 7.482 6.02
1266 7.902 4.816
1249 8.006 11.44
1238 8.077 1.806
1228 8.141 2.408
1207 8.288 5.418
1192 8.39 1.806
1151 8.687 1.204
1100 9.093 9.632
1057 9.459 2.408
1038 9.638 1.806
1023 9.778 4.816
998.6 10.01 0.602
967.2 10.34 0.602
950 10.53 4.816
883.5 11.32 32.51
873.4 11.45 1.204
823.7 12.14 54.18
803.9 12.44 0.602
773.6 12.93 48.16
743.6 13.45 60.2
684.7 14.6 1.204
620.9 16.11 3.01
601.3 16.63 6.622
585 17.09 1.204
554.3 18.04 5.418

Laboratory Spectrum

LabLeft-clk & Shift: drag to zoom; Left-clk + Ctrl: Pan; Right-clk: Reset.

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):


You are kindly asked to consider the following references for citation when using the database:


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