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Schultz, Thomas
CRASY(Correlated Rotational Alignment Spectroscopy)
Research Interests
  • Correlated spectroscopy

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Time- and frequency-resolved photoionization of the C (2)A(2) state of the benzyl radical, C7H7

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Title
Time- and frequency-resolved photoionization of the C (2)A(2) state of the benzyl radical, C7H7
Author
Margraf, MarkusNoller, BastianSchroeter, ChristianSchultz, ThomasFischer, Ingo
Keywords
Benzyl radicals; Biexponential decay; Electronic ground state; Excitation wavelength; Femtosecond pumps; Flash pyrolysis; Free jets; Internal conversions; Multiphoton ionization spectra; Structure and dynamics; Vibronic bands; Wavelength ranges
Issue Date
201008
Publisher
AMER INST PHYSICS
Citation
JOURNAL OF CHEMICAL PHYSICS, v.133, no.7, pp. -
Abstract
The structure and dynamics of the C A2 2 electronically excited state of the benzyl radical, C7 H7, were investigated by nanosecond and femtosecond pump-probe photoionization. A free jet of benzyl radicals was generated by flash pyrolysis from the precursors 2-phenylethyl nitrite and toluene. Nanosecond multiphoton ionization spectra show a number of vibronic bands that are excited in the wavelength range of 290-310 nm. At excitation wavelengths of 305, 301, and 298 nm, rapid biexponential decay of the excited states was observed. Lifetimes at the C-state origin (305 nm excitation) are 400 fs and 4.5 ps. The lifetimes decrease with increasing excitation energy. The dynamics can be understood within a two-step internal conversion to the electronic ground state.
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DOI
http://dx.doi.org/10.1063/1.3469787
ISSN
0021-9606
Appears in Collections:
SNS_Journal Papers
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