Raman light scattering by compositions of highly ordered trans-nanopolyacetylene

Valerii M. Kobryanskii

doi:10.1117/12.351256

30 June 1999 Raman light scattering by compositions of highly ordered trans-nanopolyacetylene

Valerii M. Kobryanskii

Proceedings Volume 3790, Engineered Nanostructural Films and Materials; (1999) https://doi.org/10.1117/12.351256
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Compositions of highly ordered trans-nanopolyacetylene (trans-NPA) were prepared in the form of solutions, films and plates. They are characterized by the high stability and vibrational structure of the cis and trans bands in UV-Vis absorption spectra. There are five basic features that distinguish the Raman scattering by the trans-NPA compositions from the Raman scattering by the standard trans-PA modification. (1) Extremely low intensity of fluorescence at excitation in visual region. (2) The weak frequency dispersion of polyene C=C and C-C stretching bands, which is evidence for the narrow length distribution of conjugation chains. (3) The occurrence of long sequences of overtones and combination bands in room- temperature resonance and off-resonance Raman spectra. (4) High intensities of the anti-Stokes lines of the fundamentals v₁ and v₃ of the polyene chain. (5) Extremely high intensities of the v₁ and v₃ fundamentals of the polyene chain.

Citation Download Citation

Valerii M. Kobryanskii "Raman light scattering by compositions of highly ordered trans-nanopolyacetylene", Proc. SPIE 3790, Engineered Nanostructural Films and Materials, (30 June 1999); https://doi.org/10.1117/12.351256

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