Soliton and bipolaron excitations in conjugated polymers of different conjugation length

Purpose of this research has been to investigate the dependence of the non linear ex citations in conjugated polymers on their conjugation length. To this end CW photomodulation technique has been applied to study the photoexcitations of both a form of soluble polyacetylene with controlled conjugation length and an unsymmetrical polydiacetylene and its oligomers.