volume 5, issue 3, P451-456 2014
DOI: 10.5155/eurjchem.5.3.451-456.1033
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Abstract: KEYWORDSSome 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 polari…

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