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Derivatives of diphenyl-diketo-pyrrolopyrrole, possessing electron-donating or withdrawing groups in the p-position of the phenyl, were synthesized and studied using optical characterization (absorption, fluorescence, time-resolved fluorescence) and quantum chemical calculation. An increase in absorption coefficient ≥10 5 dm 3 mol −1 cm −1 was observed using electron–donor...
Dipyridyldiketopyrrolopyrrole and phenylpyridyldiketopyrrolopyrrole were investigated in terms of the effect of acid vapour on their properties, in comparison with diphenyldiketopyrrolopyrrole. Materials were deposited by vacuum evaporation in the form of thin films ca. 100 nm thick. Reversible changes of UV-VIS absorption spectra as well as those of IR absorption spectra when treated with acid vapour...
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