Conformation of substituted polyacetylenes in solution : relationship between electronic properties and local order

P. Garrin , J. Aimé , J. Fave , S. Ramakrishnan , G. Baker

A study of the chain conformation in solutions of polyphenylacetylene and poly(2-octyne) has been performed. The two polymers differ in many ways : polyphenylacetylene gives a red solution while poly(2-octyne) is transparent and, a marked difference on the chain rigidity is observed : the statistical length are 45 Å and 135 Å respectively. From the study of these two systems, one deduces that curvature fluctuations play a minor role on the π electrons localization, and that the torsion between monomer units is the pertinent parameter to understand the chain conformation and the π electrons localization.

Domains: Physics archives

P. Garrin, J. Aimé, J. Fave, S. Ramakrishnan, G. Baker. Conformation of substituted polyacetylenes in solution : relationship between electronic properties and local order. Journal de Physique II, 1992, 2 (3), pp.529-546. ⟨10.1051/jp2:1992147⟩. ⟨jpa-00247648⟩