Two-photon spectroscopy of antiaromatic molecules: the case of biphenylene

  • Bich V
  • Bini R
  • Salvi P
 et al. 
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The two-photon spectrum and polarization ratio of biphenylene have been measured at room temperature in the spectral range 225-370 nm, combining fluorescence-excitation and thermal-lensing techniques. The first excited Agstate 2Ag, has been observed around 265 nm and the second excited B1g, 2B1g, has its onset at ≈ 225 nm. Similarities and differences with alternant aromatics are pointed out. MO calculations of two-photon intensities support the interpretation of the experimental data. © 1990.

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  • V. T. Bich

  • R. Bini

  • P. R. Salvi

  • G. Marconi

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