Photochemistry of N-acetyl and N-benzoyl carbazoles: photo-Fries rearrangement and photoinduced single electron transfer

SERGIO M. BONESI, ROSA ERRA-BALSELLS

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

Elsevier Science SA

Lugar: The Netherlands; Año: 1997 vol. 110 p. 271 - 284

1010-6030

The photochemistry of two N-acylcarbazoles in different pure and mixed organic solvents is studied. Depending on the properties of the medium, photo-Fries rearrangement and photoinduced single electron transfer (PSET) process are observed yielding the former 1-acyl and 3-acylcarbazoles and the latter 3-chloro-N-acylcarbazole. kSV, kQ and ff for fluorescent emission, conversion of N-acylcarbazole and product formation yields have been measured as well as the properties of the N-acylcarbazole radical cations formed during the PSET process (laser flash photolysis experiments). Rehm-Weller equation is used in order to evaluate the DGº(ET) of the PSET processes.