Characteristics of monolayers of calix[4]resorcinarenes derivatives having azobenzene chromophores

Kunihiro Ichimura, Masanori Fujimaki, Yoko Matsuzawa, Yuko Hayashi, Masaru Nakagawa

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The adsorption behavior of calix[4]resorcinarenes (CRAs) and their O-carboxylmethylated and O-hydroxyethylated derivatives (CRA-CMs and CRA-HEs) from solutions was studied, aiming at the fabrication of self-assembled monolayers on polar surfaces of amorphous solid such as silica. These macrocyclic amphiphiles displayed considerably enhanced adsorption constants, due to the contribution of their multi-site adsorptivity, to form densely packed monolayers simply by immersing a silica plate in dilute solutions of the amphiphiles. CRA and CRA-CM bearing four azobenzene moieties at the lower rim of the cylindrical skeleton were prepared to modify a silica surface with photo-reactive monolayers by the surface adsorption technique. Adsorbed monolayers exhibited efficient E-to-Z photoisomerizability and applied to the photocontrol of alignment of liquid crystals and of dispersibility of colloidal silica.

Original languageEnglish
Pages (from-to)353-359
Number of pages7
JournalMaterials Science and Engineering C
Volume8-9
DOIs
Publication statusPublished - 1999 Dec 1
Externally publishedYes

Keywords

  • Adsorption
  • Macrocyclic amphiphile
  • Photoisomerization
  • Self-assembled monolayer

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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