Fluorescence anisotropy of dyes included in crosslinked polystyrene

Marcia Levitus, José Luis Bourdelande, Gerard Marqués, Pedro F. Aramendía

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


In this work we investigate on the local free volume of a crosslinked polystyrene by studying the steady-state fluorescence anisotropy of three probes with different sizes and shape, embedded in the polymer matrix. The very low values measured for the steady-state fluorescence anisotropy show that the molecules can perform ample movements during their excited-state lifetimes (typically few nanoseconds). Moreover, anisotropy values decrease with the size of the probe. Results were interpreted in terms of Saupe order parameters and the wobbling-in-cone model.

Original languageEnglish (US)
Pages (from-to)77-82
Number of pages6
JournalJournal of Photochemistry and Photobiology A: Chemistry
Issue number1-3
StatePublished - Sep 1999
Externally publishedYes


  • Anisotropy
  • Fluorescence
  • Polystyrene

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)


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