ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Some New Nitrogen Bridgehead Heterocyclic Cyanine Dyes

A. I. M. Koraiem, H. A. Shindy, and R. M. Abu El-Hamd

Department of Chemistry, Aswan Faculty of Science, Aswan, Egypt

Abstract: New monomethine, trimethine, and azomethine cyanine dyes of pyrazolo[4',5':5,6] (pyrazinio/1,4-oxazinio) [2,3,4-i,j]quinolin-11-ium bromides were prepared. These cyanines were identified by elemental and spectral analyses. The visible absorption spectra of some selected dyes were investigated in single and mixed solvents, and also in aqueous buffer solutions. The spectral shifts are discussed in relation to molecular structure and in terms of medium effects. Molecular complex formation with DMF was verified through mixed-solvent studies.

Full paper in Portable Document Format: 542a78.pdf

Chemical Papers 54 (2) 78–86 (2000)