Picosecond-nanosecond laser photolysis studies on the photochemical reaction of excited benzophenone with 1,4-diazabicyclo[2.2.2]octane in acetonitrile solution: proton abstraction of the free benzophenone anion radical from the ground state amine
✍ Scribed by Hiroshi Miyasaka; Kazuhiro Morita; Kenji Kamada; Noboru Mataga
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 588 KB
- Volume
- 178
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Picosecond and nanosecond dynamics of the ion pair produced by the electron transfer reaction between the triplet state benzophenone ('BP*) and 1,4-diazabicyclo[ 2.2.2loctane (DABCO) wasinvestigated by means oftransientabsorption spectroscopy and laser-induced photoconductivity measurement. It has been revealed that the solvated free anion radical of BP, produced by the rapid ionic dissociation of the ion pair within 2 ns, abstracts proton from the neutral DABCO giving benzophenone ketyl radical, competing with the charge recombination reaction at encounter with DABCO+, decomposition and/or impurity scavenging processes.