European Journal of Chemistry

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

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Published: Sep 30, 2014
DOI: https://doi.org/10.5155/eurjchem.5.3.451-456.1033
Keywords:
Synthesis, Cyanine dyes, Absorption spectra, Acid-base properties, Dimethine cyanine dyes, Solvent effect on spectra
Section
Research Article
Issue
Vol. 5 No. 3 (2014): September 2014
Dates
Received 2014-02-14
Accepted 2014-03-29
Published 2014-09-30


Main Article Content

Hassan Abazied Shindy
Department of Chemistry, Faculty of Science, Aswan University, Aswan 81511, Egypt
Mohamed Abdalla El-Maghraby
Department of Chemistry, Faculty of Science, Aswan University, Aswan 81511, Egypt
Fayez Mohamed Eissa
Department of Chemistry, Faculty of Science, Aswan University, Aswan 81511, Egypt

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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