Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
177645 | Dyes and Pigments | 2009 | 10 Pages |
Abstract
Bis aromatic diazenes which possess either two identical or two different azulene-1-yl groups substituted at either 1,3 or 1,4-positions in the bridging phenylene moiety were synthesized in good yield via diazotization of the 3- or 4-azulen-1-ylazo-phenylamines followed by coupling with azulene in a buffered medium. The electronic spectra of the synthesized compounds were analyzed by comparison with those of previously published compounds. The isosbestic points obtained by protonation of the compounds enabled their pKa values to be determined.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Alexandru C. Razus, Liviu Birzan, Mihaela Cristea, Bogdan Popa,