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Effects of chemical structure, solvent and solution pH on the visible spectra of some new methine cyanine dyes
Hassan Abazied Shindy (1,*)
, Mohamed Abdalla El-Maghraby (2) , Fayez Mohamed Eissa (3) (1) Department of Chemistry, Faculty of Science, Aswan University, Aswan 81511, Egypt
(2) Department of Chemistry, Faculty of Science, Aswan University, Aswan 81511, Egypt
(3) Department of Chemistry, Faculty of Science, Aswan University, Aswan 81511, Egypt
(*) Corresponding Author
Received: 14 Feb 2014 | Accepted: 29 Mar 2014 | Published: 30 Sep 2014 | Issue Date: September 2014
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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DOI: 10.5155/eurjchem.5.3.451-456.1033
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Chemistry Department, Faculty of Science, Aswan University, Aswan, Egypt
Citations
[1]. Hassan Abazied Shindy, Maha Mubark Goma, Nemat Abd El-Rahman Harb
Synthesis, spectral behavior and biological activity of some novel 1,3,4-oxadiazine cyanine dyes
European Journal of Chemistry 6(2), 151, 2015
DOI: 10.5155/eurjchem.6.2.151-156.1218
[2]. H.A. Shindy
Structure and solvent effects on the electronic transitions of some novel furo / pyrazole cyanine dyes
Dyes and Pigments 149, 783, 2018
DOI: 10.1016/j.dyepig.2017.11.055
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DOI Link: https://doi.org/10.5155/eurjchem.5.3.451-456.1033
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European Journal of Chemistry 2014, 5(3), 451-456 | doi: https://doi.org/10.5155/eurjchem.5.3.451-456.1033 | Get rights and content
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