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Linear Optical Properties of a Series of Polyacetylene Oligomers

Schaffer, H. E. / Chance, R. R. / Knoll, K. / Schrock, R. R. / Silbey, R.

Abstract A homologous series of polyacetylene oligomers having up to 13 double bonds has been prepared, thus allowing, for the first time, an examination of optical properties of polyenes having enough conjugation length to suggest extrapolation to the polymer. We have measured two linear optical properties, the uv-visible absorption spectra in solid and solution form and the Raman scattering spectra in solid form. Both the lowest energy electronic absorption peak and the frequency of the Raman band associated with the carbon-carbon double bond stretch become linear in 1/n for n≥7. Assuming the validity of the 1/n extrapolation, the results suggest that the familiar forms of polyacetylene have effective conjugation lengths of no more than approximately 30 double bonds.

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Linear Optical Properties of a Series of Polyacetylene Oligomers

Schaffer, H. E. / Chance, R. R. / Knoll, K. / Schrock, R. R. / Silbey, R.

Abstract A homologous series of polyacetylene oligomers having up to 13 double bonds has been prepared, thus allowing, for the first time, an examination of optical properties of polyenes having enough conjugation length to suggest extrapolation to the polymer. We have measured two linear optical properties, the uv-visible absorption spectra in solid and solution form and the Raman scattering spectra in solid form. Both the lowest energy electronic absorption peak and the frequency of the Raman band associated with the carbon-carbon double bond stretch become linear in 1/n for n≥7. Assuming the validity of the 1/n extrapolation, the results suggest that the familiar forms of polyacetylene have effective conjugation lengths of no more than approximately 30 double bonds.

Linear Optical Properties of a Series of Polyacetylene Oligomers

Schaffer, H. E. / Chance, R. R. / Knoll, K. / Schrock, R. R. / Silbey, R.

Abstract A homologous series of polyacetylene oligomers having up to 13 double bonds has been prepared, thus allowing, for the first time, an examination of optical properties of polyenes having enough conjugation length to suggest extrapolation to the polymer. We have measured two linear optical properties, the uv-visible absorption spectra in solid and solution form and the Raman scattering spectra in solid form. Both the lowest energy electronic absorption peak and the frequency of the Raman band associated with the carbon-carbon double bond stretch become linear in 1/n for n≥7. Assuming the validity of the 1/n extrapolation, the results suggest that the familiar forms of polyacetylene have effective conjugation lengths of no more than approximately 30 double bonds.

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Title:

Linear Optical Properties of a Series of Polyacetylene Oligomers

Contributors:

Schaffer, H. E. (author) / Chance, R. R. (author) / Knoll, K. (author) / Schrock, R. R. (author) / Silbey, R. (author)

Published in:

Conjugated Polymeric Materials: Opportunities in Electronics, Optoelectronics, and Molecular Electronics ; 365-376

NATO ASI Series ; 182

Publication date:

1990-01-01

Size:

12 pages

ISBN:

978-94-010-7416-2 , 978-94-009-2041-5

ISSN:

DOI:

https://doi.org/10.1007/978-94-009-2041-5_27

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

Single Bond , Raman Shift , Conjugation Length , Raman Frequency , Resonance Raman Spectrum Chemistry , Industrial Chemistry/Chemical Engineering , Characterization and Evaluation of Materials , Organic Chemistry , Optics, Lasers, Photonics, Optical Devices

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