Synthesis of Fluorescent Dichromophoric Benzothiazole-Based Polyenes

Title:Synthesis of Fluorescent Dichromophoric Benzothiazole-Based Polyenes

Volume: 9 Issue: 10

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

Affiliation:

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

Abstract: 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.

Cite this article as:

Nourmohammadian Farahnaz and D. Gholami Mahnaz, Synthesis of Fluorescent Dichromophoric Benzothiazole-Based Polyenes, Letters in Organic Chemistry 2012; 9 (10) . https://dx.doi.org/10.2174/157017812803901863