Effect of aliphatic tails on surface anchoring of amphiphilic rutheniumpolypyridine complexes in water-cast polymer films as studied by photoinduced electron-transfer and optical second harmonic generation

Sunao Yamada, Yasuro Niidome, Takashi Nakano, Yu Ki Tanaka, Yoshihisa Shimada, Sandy I.Yin Lee, Taku Matsuo

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A thin poly(methyl methacrylate) (PMMA) film incorporating an amphiphilic ruthenium (Ru)-polypyridine complex having two (Ru2C16B) or four (Ru4C16B) aliphatic tails, and/or an amphiphilic viologen (LPV), was prepared on a water surface. Both interfacial and in-film photoinduced electron-transfer from the Ru-complex to LPV occurred more effectively in Ru2C16B as compared with Ru4C16B, suggesting more exposure of the hydrophilic head group of Ru2C16B at the film surface. Polarized optical second harmonic generation (SHG) studies on the Ru-complex-impregnated film also verified orientational difference between the two complexes; Ru4C16B tended to take more stand-up orientation as to the film surface. The SHG signal increased quadratically with the number of films in the presence of air gaps among them.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalThin Solid Films
Volume352
Issue number1-2
DOIs
Publication statusPublished - Sep 8 1999

All Science Journal Classification (ASJC) codes

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

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