Femtochemistry of the iodine-arene charge-transfer complex

Egbert Lenderink, Koos Duppen, Douwe A. Wiersma

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Abstract

Femtosecond spectroscopy is used to investigate the ultrafast photochemistry of the I2:arene charge-transfer complex that occurs upon excitation into the charge-transfer state. We find that the photo-excited complex branches into two different channels within 25 fs. The dominant channel involves breaking up of the I2:arene complex in its constituent molecules, in the other channel the I:arene complex and an iodine atom are formed. From the polarization anisotropy and the absence of fast geminate recombination of the I:arene and atomic iodine fragments we conclude that in the transition state the I2:arene complex is severely distorted. The molecular I2 formed in a separate channel of the reaction recombines with arene to I2:ar in about 10 ps.
Original languageEnglish
Pages (from-to)503-510
Number of pages8
JournalChemical Physics Letters
Volume211
Issue number6
DOIs
Publication statusPublished - 27-Aug-1993

Keywords

  • IMPULSIVE STIMULATED SCATTERING
  • FEMTOSECOND OPTICAL PULSES
  • GEMINATE RECOMBINATION
  • CONDENSED-PHASE
  • TIME-DOMAIN
  • DYNAMICS
  • PHOTODISSOCIATION
  • PREDISSOCIATION
  • LASER
  • PICOSECOND

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