Photoinduced electron transfer chemistry of 2,3-dicyanonaphthalene

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Journal titleCanadian Journal of Chemistry
Pages787791; # of pages: 5
Subjectphotoinduced electron transfer, laser flash photolysis, fluorescence, photosensitizers
AbstractThe electron transfer photochemistry of 2,3-dicyanonaphthalene has been studied by a combination of fluorescence and transient absorption spectroscopy. The singlet excited state has a lifetime of 26 ns in acetonitrile and reacts with aromatic and alkene donors with oxidation potentials less than ~1.8 V with rate constants that are close to the diffusion-controlled limit. Transient absorption measurements demonstrate that the fluorescence quenching leads to efficient formation of free-radical ions. The radical ion yields have been measured for several donors and are compared to those for the more commonly used sensitizer, 1.4-dicyanonaphthalene. In the absence of added donors, direct excitation of 2,3-dicyanonaphthalene provides evidence for photoionization at high laser energy, in addition to triplet formation. The results illustrate the utility of this sensitizer for photoinduced electron transfer reactions.
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AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
NRC number42174
NPARC number12329038
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Record identifier30cb24fa-01c8-42a5-b7cb-6cd03962dded
Record created2009-09-10
Record modified2016-05-09
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