European Journal of Chemistry 2014, 5(3), 451-456. doi:10.5155/eurjchem.5.3.451-456.1033

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

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.


Keywords


Synthesis; Cyanine dyes; Absorption spectra; Acid-base properties; Dimethine cyanine dyes; Solvent effect on spectra

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DOI: 10.5155/eurjchem.5.3.451-456.1033

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[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
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[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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How to cite


Shindy, H.; El-Maghraby, M.; Eissa, F. Eur. J. Chem. 2014, 5(3), 451-456. doi:10.5155/eurjchem.5.3.451-456.1033
Shindy, H.; El-Maghraby, M.; Eissa, F. Effects of chemical structure, solvent and solution pH on the visible spectra of some new methine cyanine dyes. Eur. J. Chem. 2014, 5(3), 451-456. doi:10.5155/eurjchem.5.3.451-456.1033
Shindy, H., El-Maghraby, M., & Eissa, F. (2014). Effects of chemical structure, solvent and solution pH on the visible spectra of some new methine cyanine dyes. European Journal of Chemistry, 5(3), 451-456. doi:10.5155/eurjchem.5.3.451-456.1033
Shindy, Hassan, Mohamed Abdalla El-Maghraby, & Fayez Mohamed Eissa. "Effects of chemical structure, solvent and solution pH on the visible spectra of some new methine cyanine dyes." European Journal of Chemistry [Online], 5.3 (2014): 451-456. Web. 17 Sep. 2019
Shindy, Hassan, El-Maghraby, Mohamed, AND Eissa, Fayez. "Effects of chemical structure, solvent and solution pH on the visible spectra of some new methine cyanine dyes" European Journal of Chemistry [Online], Volume 5 Number 3 (30 September 2014)

DOI Link: https://doi.org/10.5155/eurjchem.5.3.451-456.1033

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