Fig. 4.
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Evolution of the first absorption peak of the C2n-2P series computed within TDDFT (circles) with the number of carbon atoms. For comparison, computed values for pyrene (diamond), HC8H (filled square), and experimental data from Pino et al. (2001) for HC2nH (open squares) are reported. DIBs are observed at wavelengths longer than 400 nm, that is to say above the dashed line.
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