REACTIONS OF POLYMETHINE DYES. I. SYNTHESIS OF THE PSEUDOBASES OF POLYMETHINE DYES AND THEIR TRANSFORMATIONS
Nonsalt-like benzene-soluble pseudobases are formed in the reaction of polymethine dyes with sodium alcoholates.The presence of ionized and un-ionized forms of the pseudobases was established by electronic absorption spectra in aprotic solvents.Solutions of these compounds in alcohols only contain the ionized forms; the unionized form predominates in benzene solutions.The action of various acids on the pseudobases leads to the production of polymethine dyes with the respective anions.
Vompe, A. F.,Ivanova, L. V.,Meskhi, L. M.,Monich, N. V.,Raikhina, R. D.
p. 529 - 537
(2007/10/02)
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