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We have studied the electronic structure and the elementary excitations of the red phase of poly[1,6-di(N-carbazolyl)-2,4-hexadiyne] (polyDCHD) by electronic and Raman spectra and by photoinduced absorptions in the medium and near-infrared regions. The results are interpreted in terms of the coexistence in this polymer of both ordered and disordered regions. By comparing the present data with those...
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