Studies of Raman scattering in novel disubstituted acetylene polymers

被引：7

作者：

Fujii, A ^{[1
]}

Shkunov, MN ^{[1
]}

Vardeny, ZV ^{[1
]}

Tada, K ^{[1
]}

Yoshino, K ^{[1
]}

Teraguchi, M ^{[1
]}

Masuda, T ^{[1
]}

机构：

[1] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA

来源：

OPTICAL PROBES OF CONJUGATED POLYMERS | 1997年 / 3145卷

关键词：

conducting polymers; disubstituted polyacetylenes; Raman Scattering; conjugation length; electronic structure;

D O I：

10.1117/12.295540

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 = 7 for PDPA-nBu, and N = 5 or 6 for PHxPA and PEtPA. The related energies of 1(1)B(u) and 2(1)A(g) can be estimated from these N and are in good agreement with the respective absorption and PL spectra of the various disubstituted polymers.

引用

页码：533 / 543

页数：11