Structure and Electrical Properties of Polyacetylene Yielding a Conductivity of 10⁵ S/cm

Abstract

We have prepared polyacetylene (ν-(CH) x ) yielding a conductivity of more than 105 S/cm, by making some modifications on Naarmann et al.'s method. Structural analyses of this polymer were carried out by use of various analysis techniques such as SEM, IR and resonance Raman spectroscopy to characterize ν-(CH) x . No distinct differences in structure between conventional polyacetylene and ν-(CH) x were observed except for morphology and specific gravity. Upon iodine doping, conductivity increases stepwisely, which may suggest the formation of a staging structure and/or the transformation to metallic phase. However, in the temperature dependence of conductivity, we could not find any differences which distinguish the metallic ν-(CH) x from conventional polyacetylene.

Hirshfeld-I charges in linear combination of atomic orbitals periodic calculations

“…[34][35][36] The polymer undergoes charge transfer from the alkali to the chain which results in formation of geometric solitons [37]. Recently, a charge density analysis of Li-doped transpolyacetylene (LiPA) has been done by some of us.…”

Controlled Molecular Assemblies of Electrically Conductive Polymers

“…To date, polyacetylene has exhibited both the highest electrical conductivity and the best mechanical properties (modulus and tensile strength) of any conducting polymer. Recent studies [76][77][78][79] demonstrated that major improvements in solid state properties can be achieved with higher quality polyacetylene obtained through improved synthesis. It is, therefore, the prototype example of a High Performance Conducting Polymer to which all other systems are ultimately to be compared.…”

Conducting polymers—thirteen years of Polyacetylene Doping

“…Both, p (acceptor) and n (donor) doping is ADVANCED MATERIALS possible, and the conductivity range marked by an arrow on the conductivity chart of Figure 2 can be stretched on either side. The hatched part of the arrow corresponds to the samples with very high conductivity of Naarmann['81 and Tsukamoto [19] polyacetylene. …”