ON THE STRUCTURE OF POLY(2,4-DICHLOROPHENYLACETYLENE) FROM THE DATA OF RESONANCE RAMAN-SPECTRA

The resonance Raman spectra of poly(2,4-dichlorophenylacetylene) in th e range of wavelengths of the exciting radiation between 457.9 and 647 .1 nm were studied. It was shown that the frequencies, intensities, an d shapes of the bands related to the backbone stretching vibrations ch anged as the frequency of the exciting light varied. This was explaine d by a rather broad distribution of the conjugated segments of the pol ymer over the number of conjugated C=C bonds. A possible structural mo del involving a trans-cis conformation of the chain of the polymer stu died was proposed.