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Femtochemistry of the iodine—arene charge-transfer complex

✍ Scribed by Egbert Lenderink; Koos Duppen; Douwe A. Wiersma

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
725 KB
Volume
211
Category
Article
ISSN
0009-2614

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✦ Synopsis

Femtosecond spectroscopy is used to investigate the ultrafast photochemistry of the I,: 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 12: arene complex in its constituent molecules, in the other channel the 1: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 I,: arene complex is severely distorted. The molecular I2 formed in a separate channel of the reaction recombines with arene to I*: ar in about 10 ps.

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