SYNTHESIS, VISIBLE SPECTRAL STUDIES AND BIOLOGICAL-ACTIVITY OF SOME NEW HETEROCYCLIC QUINONE TRIMETHINE AND MEROCYANINE DYES

Authors
ELHAMD RMA KORAIEM AIM SHINDY HA GOMAA MM KHALIL ZH
Citation
Rma. Elhamd et al., SYNTHESIS, VISIBLE SPECTRAL STUDIES AND BIOLOGICAL-ACTIVITY OF SOME NEW HETEROCYCLIC QUINONE TRIMETHINE AND MEROCYANINE DYES, Indian Journal of Heterocyclic Chemistry, 5(4), 1996, pp. 305-310
Citations number
4
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Indian Journal of Heterocyclic Chemistry → ACNP
ISSN journal
09711627
Volume
5
Issue
4
Year of publication
1996
Pages
305 - 310
Database
ISI
SICI code
0971-1627(1996)5:4<305:SVSSAB>2.0.ZU;2-Q
Abstract
New asymmetrical trimethine cyanine dyes (5a-d and 6a-c) and merocyani ne dyes (7a,b and 8) incorporating naphthoquinone in conjunction with thiazole/oxazole and/or oxadiazine moieties were prepared. The visible absorption spectra of (5b) was investigated in polar, nonpolar and mi xed solvents as well as in aq buffer solutions. Molecular: complex for mation with ethanol was verified by mixed solvent studies. The variati on of absorbance with pH was utilized for the determination of the pKa value for a selected dye. Bactericidal and fungicidal activity of sel ected cyanines (5b, 6b and 8) were determined.