Synthesis and spectral behaviour of some new uninuclear pyrimidine 2[2(4)]-mono(tri)-methine cyanine dyes

Article abstract of DOI:10.1002/jccs.200000069

New unsymmetrical 2[2(4)]-mono-and tri (substituted tri)-methine cyanine dyes incorporating 1,2,5,6-tetrahydro-4,6-diaryl pyrimidine (pyrimidinium-1-yl salt)-2-one were prepared. Structural determination was carried out by elemental analysis, IR and ¹H NMR spectral data. The spectral behaviour of all the synthesized cyanines was examined in 95% ethanol.