Aromatic diazenes containing azulen-1-yl moieties Part 2: The synthesis, characterization, electronic spectra and basicity of novel, bis aromatic diazenes containing two azulen-1-yl moieties

作者：Razus Alexandru C; Birzan Liviu^*; Cristea Mihaela; Popa Bogdan

来源：Dyes and Pigments, 2009, 82(2): 216-225.

DOI：10.1016/j.dyepig.2009.01.005

• Azulene
• Azo
• Diazene
• Electronic spectra
• Basicity

Bis aromatic diazenes which possess either two identical or two different azulene-1-yl groups substituted at either 13 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 pK(a) values to be determined.

• 出版日期2009-8