Studies of Raman scattering in novel disubstituted acetylene polymers

Akihiko Fujii; Maxim N. Shkunov; Z. Valy Vardeny; Kazuya Tada; Katsumi Yoshino; Masahiro Teraguchi; Toshio Masuda

doi:10.1117/12.295540

1 December 1997 Studies of Raman scattering in novel disubstituted acetylene polymers

Akihiko Fujii, Maxim N. Shkunov, Z. Valy Vardeny, Kazuya Tada, Katsumi Yoshino, Masahiro Teraguchi, Toshio Masuda

Proceedings Volume 3145, Optical Probes of Conjugated Polymers; (1997) https://doi.org/10.1117/12.295540
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

We have studied resonant and non-resonant Raman scattering spectra in thin films of novel disubstituted acetylene polymers such as poly(1-ethyl-2-phenylacetylene) (PEtPA), poly(1-n-hexyl-2-phenylacetylene) (PHxPA) and poly(1-phenyl- 2-p-n-butylphenylacetylene) (PDPA-nBu), which possess high photoluminescence (PL) quantum efficiency. We found that the Raman scattering frequency dispersion is smaller in disubstituted acetylene polymers than in other acetylene polymers, in agreement with many other strongly luminescent polymers. Assuming the model of short polyene conjugation length in these acetylene polymers, we can obtain the conjugation length (N) for each polymer from the respective phonon frequency of the carbon-carbon double bond; we obtained N equals 7 for PDPA-nBu, and N equals 5 or 6 for PHxPA and PEtPA. The related energies of 1¹B_u and 2¹A_g can be estimated from these N and are in good agreement with the respective absorption and PL spectra of the various disubstituted polymers.

Citation Download Citation

Akihiko Fujii, Maxim N. Shkunov, Z. Valy Vardeny, Kazuya Tada, Katsumi Yoshino, Masahiro Teraguchi, and Toshio Masuda "Studies of Raman scattering in novel disubstituted acetylene polymers", Proc. SPIE 3145, Optical Probes of Conjugated Polymers, (1 December 1997); https://doi.org/10.1117/12.295540

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