Using the emission properties of an intramolecular excimer-forming probe molecule to determine the effect of hydrostatic pressure on local polymer dynamics

Benny D. Freeman, Liliane Bokobza, Philippe Sergot, Lucien Monnerie, F. C. De Schryver

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5 Citations (Scopus)

Abstract

The fluorescence lifetime of the intramolecular excimer-forming probe molecule meso-2,4-di(N-carbazolyl) pentane dissolved in cis-polyisoprene and poly(propylene oxide) has been determined as a function of hydrostatic pressure. The rate of the local scale motion of the probe required to form the intramolecular excimer conformation is shown to be controlled by polymer segmental motions connected with the glass-rubber transition phenomenon. The experimental data are compared with the predictions of several free volume-based models of polymer dynamics.

Original languageEnglish
Pages (from-to)259-264
Number of pages6
JournalJournal of Luminescence
Volume48-49
Issue numberPART 1
DOIs
Publication statusPublished - 1991
Externally publishedYes

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