Photochemistry of 2-acyloxycarbazole. A key step in the synthesis of carbazole alkaloids

M. BONESI, SERGIO; K. CREVATIN, LAURA.; ERRA BALSELLS, ROSA

Photochemistry and Photobiology Sciences

Royal Chemical Society, Londres

Lugar: Londres; Año: 2004 vol. 3 p. 381 - 388

1474-905X

The photophysical behaviour of 1-nitrocarbazol and 3-nitrocarbazol in different organic solvents was studied by using spectroscopic, luminescence and photoacoustic techniques. Absorption spectra and triplet state transient spectra were recorded and its formation quantum yield and lifetime were determined. Phosphorescence emission at 77 K and laser induced luminescence in acetonitrile solution at 298 K for the nitrocarbazoles were studied. Results are discussed in terms of the optimized structure of 1-nitrocarbazole and 3-nitrocarbazole and compared with that of carbazole. The nitro group attached to the carbazole moiety induces important changes in the photophysical behavior of those compounds