Trans Isomerization Process Research Articles

Structural properties of a conducting polymer: Doped (CH) x

Structural properties of pure and doped (CH) x , prepared by the method of Shirakawa, are reviewed. Materials are characterized by their structural features (disorder crystallinity, homogeneity of the doping) which can influence electrical properties. Cis to trans isomerization process observed either upon thermal annealing or upon doping is presented on structural basis. New structures in which dopant interculates in columns or layers within the (CH) x host lattice are also considered.

Semiphenomenological analysis of cis-to- trans isomerization of polyacetylene

Semiphenomenological analysis of cis-to- trans isomerization process of polyacetylene is presented. It is shown that excitation of cis-transoid form to trans-cisoid form is necessary in the course of the isomerization. The probability of tunneling of a π electron from trans-cisoid to cis-transoid state is estimated to be about 0.7 per second. The life time of trans-cisoid form can be inferred to be several hours.