Photophysical properties of corrphycenes

The photophysical properties of the Zn salt of octaethylcorrphycene (compou nd 1) and the doubly protonated octaethylcorrphycene (compound 2) were dete rmined in benzene solutions. Fluorescence spectra and fluorescence quantum yields of Phi F (1) = 0.03 +/- 0.02 and Phi F (2) = 0.06 +/- 0.02 were meas ured. The triplet-triplet absorption spectra were obtained by means of flas h-photolysis experiments. The tripler quantum yield values Phi T (1) = 0.79 +/- 0.08 and Phi T (2) = 0.82 +/- 0.08 were obtained by using laser-induce d optoacoustic spectroscopy. The quantum yield of singlet molecular oxygen generation in air-saturated solutions, Phi(Delta) (1) = 0.55 +/- 0.07 and P hi(Delta) (2) = 0.38 +/- 0.05, were also measured using time resolved NIR l uminescence. (C) 2000 Elsevier Science B.V. All rights reserved.