A direct observation of energy migration processes in sigma-conjugated polymers hits been firstly done to it very large extent by ultra-fast transient absorption spectroscopy in near infrared (IR) region, Especially, following new results were obtained: (1) The very broad transient absorption due to excited states in various conjugated segments immediately after 266-nm excitation: (2) The shift from the very broad absorption toward the absorption with the maximum at 0.95 eV: (3) Decrease in energetic dispersion of excited states with observation time: (4) Some excited states remain in shorter conjugated segments than the radiative segments associated with the absorption maximum at 0,95 eV. (C) 2002 Published by Elsevier Science B.V.