Molecular packings-photopolymerization behavior relationship of diacetylene Langmuir-Blodgett films

Keisuke Kuriyama, Hirotsugu Kikuchi, Tisato Kajiyama

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

The formation processes of polydiacetylene (PDA) Langmuir-Blodgett (LB) films in the blue and the bluish-green forms were investigated from the viewpoint of the molecular lateral packings evaluated by electron diffraction (ED) analysis. The PDA blue and bluish-green forms exhibit absorption peaks at 640 and 704 nm in the visible absorption spectrum, respectively. During the formation process of the PDA blue form, the two-dimensional unit cell of the monomeric LB film shrunk due to the covalent bond formation among the molecules. On the other hand, during the formation process of the PDA bluish-green form, there was no change in the molecular packings. Also, the ED analysis revealed the difference in the repeating unit distances of main chains between both forms, implying that both forms had distinct resonance backbone structures. It was concluded from comparison of the ED analysis and the molecular mechanics calculation that the bluish-green form was composed of the butatrienic type main chains rather than the acetylenic ones corresponding to the resonance backbone structure of the blue form.

Original languageEnglish
Pages (from-to)6468-6472
Number of pages5
JournalLangmuir
Volume12
Issue number26
Publication statusPublished - Dec 25 1996

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Photopolymerization
Langmuir Blodgett films
Langmuir-Blodgett films
Electron diffraction
electron diffraction
Molecular mechanics
Covalent bonds
Absorption spectra
covalent bonds
visible spectrum
Molecules
absorption spectra
polydiacetylene
cells
molecules

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Molecular packings-photopolymerization behavior relationship of diacetylene Langmuir-Blodgett films. / Kuriyama, Keisuke; Kikuchi, Hirotsugu; Kajiyama, Tisato.

In: Langmuir, Vol. 12, No. 26, 25.12.1996, p. 6468-6472.

Research output: Contribution to journalArticle

Kuriyama, Keisuke ; Kikuchi, Hirotsugu ; Kajiyama, Tisato. / Molecular packings-photopolymerization behavior relationship of diacetylene Langmuir-Blodgett films. In: Langmuir. 1996 ; Vol. 12, No. 26. pp. 6468-6472.
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