European Journal of Chemistry

Effects of chemical structure, solvent and solution pH on the visible spectra of some new methine cyanine dyes



Main Article Content

Hassan Abazied Shindy
Mohamed Abdalla El-Maghraby
Fayez Mohamed Eissa

Abstract

Some new dimethine and bis-dimethine, cyanine dyes derived from benzo[2,3-b; 2`,3`-b`]bis-pyrazolo[4,5-b]-l,4-(oxa-, thia-, and pyra-)-zine-6,12-dione were synthesized. Effect of chemical structure on the electronic visible absorption spectra of all the synthesized cyanine dyes was investigated in 95% ethanol solution. Effects of solvent and/or solution pH on the electronic visible absorption spectra of some selected synthesized cyanine dyes were also examined in pure solvents having different polarities and/or in aqueous universal buffer solutions, respectively. Structural confirmations were carried out through elemental analysis, mass spectroscopy, IR and 1H NMR spectra.


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Shindy, H. A.; El-Maghraby, M. A.; Eissa, F. M. Effects of Chemical Structure, Solvent and Solution PH on the Visible Spectra of Some New Methine Cyanine Dyes. Eur. J. Chem. 2014, 5, 451-456.

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Chemistry Department, Faculty of Science, Aswan University, Aswan, Egypt
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