Very high field EPR study ofcis- andtrans-polyacetylene

Abstract

Abstraet. Some neutral cis-and trans-polyacetylene samples have been studied at 30-0.7 mm wave band EPR. A higher speclral resolution allows one to determine the principal values of anisotropic g-tensor of localized paramagnetic centers in polyacetylene, attributed to pinned neutral solitons. The Very High Frequency EPR allows us to observe the increase of a number of such centers and the appearance of soliton diffusion along the polymer chains atter the cis-trans isomerization.

High‐Field ESR Spectroscopy of Conductive Polymers

“…1a. [17][18][19] Analysis of the spectra shows 19 that two PCs are stabilized in trans-PA, namely, neutral solitons pinned on short polymer chains with g ⊥ ϭ 2.00283 and g || ϭ 2.00236, and those moving along the long polymer axis with g ϭ 2.00269 and relative contributions of 1.1 × 10…”