Peierls instability and vibrational spectra of polyacetylene

✍ Scribed by A. A. Ovchinnikov; A. E. Belinskii; I. A. Misurkin; I. I. Ukrainskii

• Publisher: John Wiley and Sons
• Year: 1982
• Tongue: English
• Weight: 668 KB
• Volume: 22
• Category: Article
• ISSN: 0020-7608
• DOI: 10.1002/qua.560220409

✦ Synopsis

Abstract

It is shown that the Peierls instability in conjugated polymers is modified by the interaction of π electrons. This modification gives rise to the absence of a soft mode of stretching CC vibrations. Taking into account electron correlations we obtain reasonable agreement between the calculated and measured frequencies of the carbon skeleton of polyacetylene with all the CC bonds being equal in length. It is shown that the conclusion for the bond length alternation in polyacetylene does not follow from the experimental data on the vibrations of polyacetylene.