Photophysical Responses of Benzimidazolic and Benzoxazolic HydroxyCoumarin Dyes

Journal: Vol.8, No.3, Summer 2015 - Article 7   Pages :  247 Until 257

Article Code:

Farahnaz Nourmohammadian: Institute of Color Science and Technology - Department of Organic Colorants
Azizollah Habibi: University of Tarbiat moallem - Department of Chemistry
Fereshteh Nazari: University of Tarbiat moallem - Department of Chemistry
Ali Ashtiani Abdi: Institute for Color Science and Technology - Department of Organic Colorants
M. Sadeghi-Kiakhani: Institute for Color Science and Technology - Department of Organic Colorants
Roghaieh Abbasi: University of Tarbiat moallem - Department of Chemistry

Article's abstract:

We synthesized four novel benzoxazolic and benzimidazolic derivatives of 6-hydroxycoumarin and their photophysical properties were studied. The products with brilliant yellow color shades declared green fluorescence. The emission peaks of the products appeared 456–474 nm. The important characteristic for fluorescent compounds, the Stokes shift νA-νF, oscillator strength f, and fluorescence quantum yield ΦF were measured. Furthermore, their photophysical and electronic properties have been investigated at the theoretical level using density functional theory. Dyeing of nylon fabrics was carried out by the synthesized fluorescent dyes as well. They generally flatten off at dye concentrations of 2-3 owf.

Benzoxazole, Benzimidazole, Coumarin dye, DFT, Fluorescence

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Prof. Zahra Ranjbar
Dr. Farahnaz Nourmohammadian
Assistant Editor:
Dr. Mozhgan Hosseinnezhad
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Institute for Color Science and Technology (ICST)

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