Thermal behavior of a Langmuir-Blodgett film of dioctadecyldimethylammonium-Au(dmit)2 salt investigated by infrared spectroscopy

Shin Ichi Morita, Akifumi Ikehata, Yasuhiro F. Miura, Michio Sugi, Yukihiro Ozaki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Thermal behavior of a Langmuir-Blodgett (LB) film of dioctadecyldimethylammonium-Au(dmit)2 (2C18-Au(dmit) 2) salt has been studied by means of infrared transmission spectroscopy. Two bands due to the CH2 antisymmetric and symmetric stretching modes have been used to monitor the orientation of the hydrocarbon chain in the 2C18-Au(dmit)2 LB film, and the absorption band due to the C=S stretching mode has been employed to investigate the aggregation state of Au(dmit)2 chromophores. Temperature-dependent infrared spectral changes have revealed that there are, at least, two different ordered states in the LB film below the order-disorder transition between 100 and 110 °C. The above results are important, showing that the heat treatment can be a powerful and versatile tool to control the structure of the 2C 18-Au(dmit)2 LB film.

Original languageEnglish
Pages (from-to)408-411
Number of pages4
JournalThin Solid Films
Publication statusPublished - 2004 Oct
Externally publishedYes


  • Au(dmit) chromophore
  • Hydrocarbon chain
  • Infrared spectroscopy
  • LB film
  • Thermal behavior

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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