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

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.
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