Infrared and Raman studies of poly(p-phenylenevinylene) and its model compounds

Akira Sakamoto, Yukio Furukawa, Mitsuo Tasumi

研究成果: Article

71 引用 (Scopus)

抄録

The infrared and Raman spectra of poly(p-phenylenevinylene) (PPV) and its low molecular weight model compounds CH3(C6H4CH=CH)nC6H 4CH3 (n = 1-3) have been studied, and the following points have been made clear. (1) The vinylene groups in PPV are slightly distorted from a planar trans form, so that the PPV molecule has approximate C2h symmetry. (2) Extensive π-electron conjugation takes place between the phenylene and vinylene groups, and the degree of conjugation increases with increasing chain length. (3) The positions and relative intensities of the infrared and Raman bands of the model compounds change regularly as the chain length increases and rapidly converge on those of PPV, which are considered to be practically identical to those of an infinitely long chain. (4) The positions of the Raman bands of PPV slightly shift with the excitation wavelength. The 363.8-nm-excited Raman spectrum seems to arise from segments whose lengths are of the order of the model compound n = 3, whereas the Raman spectra excited at longer wavelengths correspond to longer segments which are dominant in quantity.

元の言語English
ページ(範囲)1490-1494
ページ数5
ジャーナルJournal of Physical Chemistry
96
発行部数3
出版物ステータスPublished - 1992
外部発表Yes

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Raman scattering
Raman spectra
Infrared radiation
conjugation
Chain length
Wavelength
low molecular weights
wavelengths
infrared spectra
Molecular weight
methylidyne
Molecules
Electrons
shift
symmetry
excitation
poly(4-phenylenevinylene)
molecules
electrons

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

これを引用

Infrared and Raman studies of poly(p-phenylenevinylene) and its model compounds. / Sakamoto, Akira; Furukawa, Yukio; Tasumi, Mitsuo.

:: Journal of Physical Chemistry, 巻 96, 番号 3, 1992, p. 1490-1494.

研究成果: Article

Sakamoto, Akira ; Furukawa, Yukio ; Tasumi, Mitsuo. / Infrared and Raman studies of poly(p-phenylenevinylene) and its model compounds. :: Journal of Physical Chemistry. 1992 ; 巻 96, 番号 3. pp. 1490-1494.
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