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VOLUME 48 (1988) | ISSUE 7 | PAGE 367
Direct determination of the difference in the nature of the band broadening in relaxational and configurational continuous vibron spectra of complex molecules by four-photon spectroscopy
Four-photon spectroscopy has been used to study the broadening of hidden electronic-vibrational subbands in the continuous vibron spectra of triphenylmethane dyes of various degrees of complexity. The results show that the relaxation vibron spectra are broadened uniformly, in contrast with the nonuniformly broadened configurational spectra.