Synthesis of Fluorescent Dichromophoric Benzothiazole-Based Polyenes

Author(s): Farahnaz Nourmohammadian, Mahnaz D. Gholami

Journal Name: Letters in Organic Chemistry

Volume 9 , Issue 10 , 2012

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Syntheses of some novel dichromophoric cyanine dyes based on 2-aminobenzothiazoles have been reported. Their highly extended conjugated systems are in symmetrical and unsymmetrical structures, both of which are divided into two electron-rich and electron-poor series. The sixteen synthesized compounds absorb visible light in the region of 462-523 nm in ethanol in deep orange, red and purple color with high molar absorption coefficients ( : 2.1 – 4.4  104 M1.cm1). Besides the study of their electronic spectroscopic properties, broad solvatochromic effects have been observed 70-200 nm shifts in nine different solvents. In fluorescence spectroscopic studies, their emissions have been observed to be 400–500 nm at excitation wavelengths 347-375 nm in DMF.

Keywords: Aminobenzothiazole, antibacterial effect, bis-azo, polyene dyes, solvatochromic effect

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Article Details

Year: 2012
Page: [720 - 731]
Pages: 12
DOI: 10.2174/157017812803901863
Price: $65

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