Fluorescence and photophysical properties of D-[pi]-A push-pull systems featuring a 4,5-dicyanoimidazole unit

Fluorescence and photophysical properties of D-[pi]-A push-pull systems featuring a 4,5-dicyanoimidazole unit

Absorption and fluorescence spectra and fluorescence quantum yields of 18 D-; [pi]-A push-pull compounds were measured. The investigated chromophores consist of 4,5-dicyanoimidazole - bearing donor - substituted and systematically extended [pi]-conjugated spacers. The influence of temperature and so...

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Veröffentlicht in:Dyes and pigments 2011-12, Vol.91 (3), p.466-473
Hauptverfasser: Nepras, Milos, Almonasy, Numan, Bures, Filip, Kulhanek, Jiri, Dvorak, Miroslav, Michl, Martin
Format: Artikel
Sprache:eng
Schlagworte:
Bearing
Dyes
Fluorescence
Mathematical analysis
Polarity
Solvents
Spacers
Spectra
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Zusammenfassung:Absorption and fluorescence spectra and fluorescence quantum yields of 18 D-; [pi]-A push-pull compounds were measured. The investigated chromophores consist of 4,5-dicyanoimidazole - bearing donor - substituted and systematically extended [pi]-conjugated spacers. The influence of temperature and solvent polarity on the spectral and photophysical properties was investigated. Employing INDO/S calculations, the structure-property relationships were discussed.
ISSN:0143-7208
DOI:10.1016/j.dyepig.2011.03.025