Issue 12, 2014

Photophysics and photochemistry of the β-lapachone derived diphenyldihydrodioxin: generation and characterization of its cation radical

Abstract

The photophysics and photochemistry of the β-lapachone derived diphenyldihydrodioxin 3 were investigated using steady-state and time resolved techniques. Laser excitation of 3 leads to the formation of its cation radical 4 (absorption maxima at 410 and 450 nm and a lifetime of 10 μs), which was confirmed by its thermal generation employing tris(2,4-dibromophenyl)-aminium hexachloroantimonate (BAHA) as the electron acceptor. The cation radical 4 was also formed via the triplet excited state of 3 through a triplet sensitized process using benzophenone (ET = 69 kcal mol−1) as the sensitizer.

Graphical abstract: Photophysics and photochemistry of the β-lapachone derived diphenyldihydrodioxin: generation and characterization of its cation radical

Supplementary files

Article information

Article type
Paper
Submitted
27 Jun 2014
Accepted
24 Aug 2014
First published
26 Aug 2014

Photochem. Photobiol. Sci., 2014,13, 1655-1660

Author version available

Photophysics and photochemistry of the β-lapachone derived diphenyldihydrodioxin: generation and characterization of its cation radical

J. C. Netto-Ferreira, V. Lhiaubet-Vallet, B. Bernardes, A. B. B. Ferreira and M. Á. Miranda, Photochem. Photobiol. Sci., 2014, 13, 1655 DOI: 10.1039/C4PP00231H

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