## Conjugated conducting polymers |

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Page 33

2.8, which is split into a valence band ej^' = — Ek and a conduction band e[c) = +

Ek, where Ek = (4t 0 cos2 k + A\ sin2 k)112. (2.42) In particular, there is an energy

or

2.8, which is split into a valence band ej^' = — Ek and a conduction band e[c) = +

Ek, where Ek = (4t 0 cos2 k + A\ sin2 k)112. (2.42) In particular, there is an energy

or

**band gap**of 2A0 between the top of the valence band, the highest occupied ...Page 182

Therefore, an assumed helicity of the pyrrole polymer might be expected to

reduce the

optical absorption feature at the

...

Therefore, an assumed helicity of the pyrrole polymer might be expected to

reduce the

**band gap**and rotational disorder to give rise to a broadening of theoptical absorption feature at the

**band gap**. In the case of cis-polyacetylene, helix...

Page 195

three optical absorption

involving

three optical absorption

**bands**can be expected at co, and co3 for the transitionsinvolving

**band**states, and at co2 for the transition between the two levels in the**gap**. Since electron-hole symmetry is implicit in the SSH Hamiltonian, the levels ...### What people are saying - Write a review

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### Contents

Introduction | 1 |

An Overview of the Theory of Conjugated Polymers | 7 |

References | 114 |

Copyright | |

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### Common terms and phrases

A.J. Heeger atoms Baeriswyl band band gap behaviour bipolarons bond alternation bond lengths calculations CH)x chain charged solitons Chem chemical shift coefficient conducting polymers configuration conjugated polymers correlation Coulomb interactions coupling Cryst D.K. Campbell decreases defects dependence dimerization discussed dopant dopant concentration doping doping levels e-e interactions effects electron spin electron-electron interactions electron-phonon ENDOR energy excitations exciton experimental Fermi finite polyenes frequency function Hamiltonian Hartree-Fock Heeger Hiickel hopping Hubbard model hyperfine interactions inter-chain kink lattice Lett linewidth magnetic metallic molecular neutral solitons nonlinear nonlinear optical nuclear observed obtained one-dimensional optical absorption optical gap parameter peak Peierls Peierls-Hubbard model phonon Phys polarons polyacetylene polyenes polypyrrole polythiophene properties proton quantum quasi-particles Raman relaxation resonance Sect shown in Fig soliton spectra spectrum spin density SSH model structure symmetry Synth temperature theoretical theory trans trans-(CH)x transition triplet valence bond values Vardeny