The concentration dependence of excimer fluorescence in polystyrene solutions

Fu Jya Tsai, John M Torkelson*

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

The fluorescence of high- and low-molecular-weight polystyrene in a variety of solvent conditions has been measured as a function of polymer concentration up to 650 g 1-1. Measurements made using both a right-angle emission geometry and a front-face emission geometry confirm that self-absorption of fluorescence, particularly monomer fluorescence, leads to measurement of the ratio of excimer to monomer fluorescence intensities, IE IM, which overstates its true value at all but very low concentrations. When corrections are made for self-absorption effects, IE IM is essentially constant at low concentrations and increases only very slowly and smoothly at higher concentrations. Contrary to previous reports, no transition from a fractional power dependence to a linear dependence on concentration for IE IM has been observed at low polystyrene molecular weight.

Original languageEnglish (US)
Pages (from-to)1004-1009
Number of pages6
JournalPolymer
Volume29
Issue number6
DOIs
StatePublished - Jan 1 1988

Keywords

  • concentration dependence
  • excimer fluorescence
  • polystyrene
  • solution

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry

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