Multiphoton ionization of fluoranthene in tetramethylsilane

Journal Article · Sun Mar 01 04:00:00 EST 1987 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.452102· OSTI ID:6807339

Faidas, H; Christophorou, L G

The multiphoton ionization of fluoranthene in liquid tetramethylsilane in the laser excitation wavelength lambda/sub l/ range 370--550 nm is reported. From measurements of the laser wavelength and power dependencies of the ionization signal the ionization threshold was determined to be --5.7 eV. Two ionization mechanisms were identified in this wavelength region: (1) direct two-photon ionization for lambda/sub l/ approx. <435 nm and (2) three-photon ionization: involving two-photon excitation followed by relaxation to either the first and/or the second excited singlet state and subsequent one-photon ionization: which becomes the sole photoionization mechanism for lambda/sub l/ approx. >435 nm. In the wavelength region 400less than or equal tolambda/sub l/ less than or equal to435 nm both mechanisms occur.

• Research Organization: Atomic, Molecular, and High Voltage Physics Group, Health and Safety Research Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
• OSTI ID: 6807339
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 86:5; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
AROMATICS
DISPERSIONS
FLUIDS
HYDRIDES
HYDROGEN COMPOUNDS
IONIZATION
LIQUIDS
MIXTURES
MULTI-PHOTON PROCESSES
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC SILICON COMPOUNDS
PHOTOIONIZATION
SILANES
SILICON COMPOUNDS
SOLUTIONS
SOLVENT PROPERTIES