Title

Excited-State Relaxation Processes In Polymethine Dye Molecules In Polymeric Media

Keywords

Fluorescence decay kinetics; Microenvironmental homogeneity and heterogeneity; Polymeric medium; Polymethine dye; Time-resolved fluorescence spectra

Abstract

The fluorescence decay kinetics of polymethine dye molecules in liquid (ethanol) and solid (polyurethane acrylate) media has been measured. Absorption-relaxation-emission processes are studied at wide range of excitation wavelengths (from blue to red edge of absorption band), emission wavelengths (including anti-Stokes fluorescence) and of temperature (both in elastic and glassy states of polymeric medium). Time-resolved fluorescence spectra of dye molecules in polymer confirm that, in spite of macrorigidity of polymeric medium, the characteristic time of relaxation processes within the excited state is comparable to the fluorescence lifetime.

Publication Date

1-1-1996

Publication Title

Journal of Luminescence

Volume

69

Issue

2

Number of Pages

105-113

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/0022-2313(96)00080-4

Socpus ID

0030244590 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0030244590

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