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Laser two-photon ionization for determination of aromatic molecules in solution

โœ Scribed by Yamada, Sunao.; Hino, Atsushi.; Kano, Koji.; Ogawa, Teiichiro.

Book ID
127343692
Publisher
American Chemical Society
Year
1983
Tongue
English
Weight
517 KB
Volume
55
Category
Article
ISSN
0003-2700

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A simplified yet sensitive system is described for the detection of the twophoton ionization signal in solution. The photo-ionization cell consists of a quartz cuvette and a pair of stainless steel electrodes. Several aromatic compounds, including quinones, can be detected in the ng l-I-mg 1-l range

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The iotiation thxeshold of fluoranthene and of TMPD in rz-pentane was determmed by laser two-photon ionization (TPI) and found to be 450 c-0.05 and 3 88 + O-05 eV respectmely. For both molecules the TPI spectra show distinct structure due to autoionization. For fluoranthene the TPI spectrum suggests