Monodisperse stearic acid coated titanium dioxide nanoparticles (< 3 nm) have been prepared and characterized. The nanoparticles are soluble in common apolar organic solvents and bind to carboxylic acid functionalized π-conjugated oligomers to form heterosupramolecular assemblies. When [2,2′;5′,2″]terthiophene-5-carboxylic acid was coupled to the nanoparticles, the fluorescence of the terthiophene moiety of the heterosupramolecular system was completely quenched due to a photoinduced electron transfer from terthiophene to titanium dioxide. Time-resolved fluorescence and Stern-Volmer analysis revealed that the quenching is predominantly static rather than dynamic and occurs in apolar solvents.
|Original language||English (US)|
|Number of pages||7|
|Journal||Advanced Functional Materials|
|State||Published - Aug 1 2002|
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics