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 language | English |
|---|---|
| Pages (from-to) | 353-359 |
| Number of pages | 7 |
| Journal | Materials Science and Engineering C |
| Volume | 8-9 |
| DOIs | |
| Publication status | Published - 1999 Dec 1 |
| Externally published | Yes |
Keywords
- Adsorption
- Macrocyclic amphiphile
- Photoisomerization
- Self-assembled monolayer
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering