Fluorescence anisotropy of dyes included in crosslinked polystyrene

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

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9 Citations (Scopus)

Abstract

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. © 1999 Elsevier Science S.A.
Original languageEnglish
Pages (from-to)77-82
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume126
Issue number1-3
DOIs
Publication statusPublished - 1 Jan 1999

Keywords

  • Anisotropy
  • Fluorescence
  • Polystyrene

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