Optical anisotropy of excimer emission from solutions of polystyrene

doi:10.1016/0014-3057(87)90030-9

European Polymer Journal

Volume 23, Issue 2, 1987, Pages 171-172

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Abstract

The optical anisotropy of excimer emission from polystyrene dissolved in dichloromethane is found to vary with concentration and molecular weight. It is concluded that the time constant for rotation of the dimeric structure increases with increasing both concentration and molecular weight. It is proposed that intermolecular interactions cause this, and such interactions occur well below the concentration corresponding to overlap of macromolecules.

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Cited by (1)

Polarisation characteristics of excimer emissions from polymers in fluid media
1989, European Polymer Journal
The polarisation characteristics of the fluorescence of fluid solutions of polystyrene, poly(1-vinylnaphthalene), poly(2-vinylnaphthalene) and poly(acenaphthylene) have been examined over a range of concentrations and molecular weights. The emissions from the naphthalene-based polymers are totally depolarised within the timescales imposed by the excited state lifetime, as is to be expected for energy migration prior to trapping in excimer sites. The “excimer band” fluorescence of polystyrene can exhibit apparent positive degrees of polarisation at high concentrations (⩾ 10⁻² M) and high molar mass. However it has been shown that these effects result from the influence of scattered radiation and, by using time-resolution to exclude the scatter, that the emission from the excimeric state of polystyrene is totally depolarised.

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European Polymer Journal

Short communicationOptical anisotropy of excimer emission from solutions of polystyrene

Abstract

Europ. Polym. J.

Polym. Comm.

Polym. Comm.

Polarisation characteristics of excimer emissions from polymers in fluid media

Short communication
Optical anisotropy of excimer emission from solutions of polystyrene