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 language | English |
---|---|
Pages (from-to) | 503-510 |
Number of pages | 8 |
Journal | Chemical Physics Letters |
Volume | 211 |
Issue number | 6 |
DOIs | |
Publication status | Published - 27-Aug-1993 |
Keywords
- IMPULSIVE STIMULATED SCATTERING
- FEMTOSECOND OPTICAL PULSES
- GEMINATE RECOMBINATION
- CONDENSED-PHASE
- TIME-DOMAIN
- DYNAMICS
- PHOTODISSOCIATION
- PREDISSOCIATION
- LASER
- PICOSECOND