117467-10-4Relevant academic research and scientific papers
Reactivities of radical cations: Characterization of styrene radical cations and measurements of their reactivity toward nucleophiles
Johnston,Schepp
, p. 6564 - 6571 (1993)
A variety of substituted styrene radical cations (2) have been generated by 266-or 308-nm photoionization of the parent olefin in polar solvents or by electron-transfer quenching of triplet chloranil. The rate constant for decay of most of the radical cat
Photoinduced electron transfer chemistry of 2,3-dicyanonaphthalene
Brancaleon,Brousmiche,Johnston
, p. 787 - 791 (2007/10/03)
The 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.
