Photoinduced electron transfer in heterosupramolecular assemblies of TiO2 nanoparticles and terthiophene carboxylic acid in apolar solvents

Z. Bao, V. Kuck, J. A. Rogers, M. A. Paczkowski

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

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 languageEnglish (US)
Pages (from-to)519-525
Number of pages7
JournalAdvanced Functional Materials
Volume12
Issue number8
DOIs
StatePublished - Aug 1 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry

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